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I'm looking for a backup battery. Has anyone come across any that have enough juice to put a good charge on the nook? I know those little 400mah batteries can charge the nook but how long will 400mah last? I'm looking for something that can give it a 50%+ charge
This what you are looking for? That would get you about 1.5 charges.
This would give you about 1 charge.
The Zagg one would be perfect but its $100! I dont want to spend over $50 guess I should have said that.
I will look into the other one you posted thanks
EDIT: The energizer one looks great!! I am probably going to order one. Thanks a lot!
I didn't notice an amp output on the energizer. NC is looking for 1900 mA for proper charging. That first gizmo is dead perfect but 100 beans is a bit outside my budget too. I have a 4400 mah battery that does 1000 mA output- i wonder if that would add a few hours to my NC? I take very long flights often.
Sent from my Nookcolor
markiejones said:
I didn't notice an amp output on the energizer. NC is looking for 1900 mA for proper charging. That first gizmo is dead perfect but 100 beans is a bit outside my budget too. I have a 4400 mah battery that does 1000 mA output- i wonder if that would add a few hours to my NC? I take very long flights often.
Sent from my Nookcolor
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If I remember right The stock nook color charger is rated at 1.9A which is 1950mah. The energizer website lists the battery linked above as 1750mah which should work great.
Check out Brunton Chargers:
http://www.rei.com/category/40006509
I went with this unit, http://www.amazon.com/gp/product/B0038VQET4/ref=oss_product
It's under $40 and provides a full charge.
What is the recommended way to test the time-to-charge? There are two issues that I see in capturing this data.
1) You really shouldn't run the thing dry - I mean it won't even boot with the power adapter plugged in until it has a little juice in the battery. I suppose youl could to drain it to 25% then charge from there. Then add 25% to whatever your time-to-full is?
2) how can you tell how long this thing takes to charge if you're asleep. Is there a log file which gets updated with charging events? Or some specific app for such things?
A little big but if you want to keep your mobile devices running for a long time try this:
http://www.amazon.com/gp/product/B003ZBZ64Q/ref=oss_product
It charges my NC and G2 3 times each and change. Especially useful when using the wireless tethering on the G2 to keep the NC online.
I've been running my NC entirely from a Tekkeon MyPower MP3450 with the MP3450-10 add-on pack for two full days of heavy usage (probably around 18 hours or so of actual use) and the MyPower is only drained down half-way while keeping the NC topped off at 100%. I'll be back with an update in another couple of days when I expect it to be empty.
Edit: Yep, I got four days of heavy usage (probably equivalent to four full recharges of the NC) from the Tekkeon pack. I bought it to keep my laptop running on long flights, but it's nice to know I'll be able to read if the power goes out for a few days.
Will using a standard usb cable with these backup batteries still only charge at .5A? If I use the stock nc cable on the energizer battery linked above will it damage the battery?
Have you looked at Monoprice? They have battery backups. I haven't personally ordered one of these (yet...need one for my evo) but I've ordered lots of stuff from them and everything has worked very well.
2800 maH
1900 maH
jerrykur said:
I went with this unit, http://www.amazon.com/gp/product/B0038VQET4/ref=oss_product
It's under $40 and provides a full charge.
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That's a decent price. Have you had much of a chance to test the unit?
With the NC's built-in battery rated at 4000 mAh, this battery should be able to completely recharge an NC. Or give you an additional ~8+ power-on hours.
johnny15 said:
Have you looked at Monoprice? They have battery backups. I haven't personally ordered one of these (yet...need one for my evo) but I've ordered lots of stuff from them and everything has worked very well.
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I have a version of one of those, works fine except it's hard to keep in place. If you get one, also get a M-F cable as well.
I went with THIS deal to get THIS battery pack for free. Not expecting much, but will post back when I have some results.
Eascen said:
I have a version of one of those, works fine except it's hard to keep in place. If you get one, also get a M-F cable as well.
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Im finding it near impossible to find a USB 2.0 Micro-A male to Micro-AB female cord. Especially in a shorter length.
I have up trying to find a cable and bought http://www.amazon.com/gp/product/B003NTYYXY. I will update my findings when I get it.
shaxs said:
Im finding it near impossible to find a USB 2.0 Micro-A male to Micro-AB female cord. Especially in a shorter length.
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When I bought mine, I just Googled "buy micro usb extension." I just did it again and found this in seconds...
http://www.usbfirewire.com/Parts/rr-mcb-ext-xxg.html
A Micro B male fits both Micro A and B female, which is why nobody bothers selling Micro A male cables... It would be less compatible with nothing to gain.
RoboRay said:
When I bought mine, I just Googled "buy micro usb extension." I just did it again and found this in seconds...
http://www.usbfirewire.com/Parts/rr-mcb-ext-xxg.html
A Micro B male fits both Micro A and B female, which is why nobody bothers selling Micro A male cables... It would be less compatible with nothing to gain.
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Thanks..I am surprised Monoprice doesnt carry it. Anywho, after shipping + cost of that cable + 2 x 2800 mAh, it was cheaper to buy the one from Amazon.
First post here, be easy on me. I love this Nexus S, my first android phone, but man this battery issue has really bothered me. I would wake up in the morning, take my phone off the charger and immediately be at 96%. After 15 minutes of checking emails and surfing, I would be below 90% by the time I got to work an hour later. I was spending half the day charging my battery, so I decided to order 2 OEM batteries and a wall charger off Ebay.
Well little I did I know that this would solve two problems. First, the wall charger charges the batteries to 100% and provides significantly more life. For some reason the phone does not let the battery truly get to 100%. Second, when I get home from work or wherever, I can just pop in another battery and be fully charged again. Now I don't have to sit and worry about charging my battery all the dang time, and my batteries are lasting much longer to boot using the wall charger. I am not sure I can post links yet, so what I ordered was an M9P wall charger for like $10 and a couple extra OEM batteries for $10/per on Ebay. I ordered from US sellers so I didnt have to wait weeks also. You might be able to find cheaper if you order from a hong kong seller. Anyway, I hope this helps someone as frustrated as me.
This has been posted MANY MANY times.
http://forum.xda-developers.com/showthread.php?t=882679
No trickle charge is applied because lithium-ion is unable to absorb overcharge. A continuous trickle charge above 4.05V/cell would causes plating of metallic lithium that could lead to instabilities and compromise safety. Instead, a brief topping charge is provided to compensate for the small self-discharge the battery and its protective circuit consume. … Typically, the charge kicks in when the open terminal voltage drops to 4.05V/cell and turns off at a high 4.20V/cell.
There is a whole lot more info on that site, but I’ll sum up the excerpt, if you continually charge a Lithium Ion battery, it will degrade, and worst case explode, but hey, at least it looks cool when it does.
Just don’t end up like others have, for example, a Chinese man who took his phone off the charger, put it in his pocket, and then it exploded. To read a little more about that, check out EnGadget, if you want to see the phone, Tech-Ex. Here’s another one, no one was killed, but it burst into flames, over on PCWorld.
http://www.ziggy471.com/2011/01/02/overcharging-batteries/
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IMO. I rather have it sit at 95% than to have my phone catch on fire. Better safe than sorry.
I've been charging my mobile devices to 100% for years with no issues. I'm not too worried about it since I don't mod my phone. All I wanted to do was have a battery that lasts and I now have that. Thank you.
turbodroid said:
First, the wall charger charges the batteries to 100% and provides significantly more life.
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Have you actually measured this, or is it just a "gut feeling"?
Now I don't have to sit and worry about ...
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There's an app medication for that ...
in the end charging via USB/PC gets a fuller charge because its more of a trickle, though it can be dangerous
shrivelfig said:
Have you actually measured this, or is it just a "gut feeling"?
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The battery level reads a full 100% when I plug the fully charged battery in. I just changed battery again this morning.
slowz3r said:
in the end charging via USB/PC gets a fuller charge because its more of a trickle, though it can be dangerous
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From what I am seeing and how much longer my battery is lasting, I am getting a fuller charge and WAY longer battery life charging batteries in the wall charger. I had the same issue as many others with this phone. The battery wouldn't charge to 100% and general battery life is pretty poor. I thought my phone was bad so I exchanged it and the battery life was identical.
I recommend everyone who questions my results, if you have a spare $20 and are sick of the poor battery performance of this phone to get a wall charger and spare OEM battery off Ebay or wherever. Theories are nice and everyone has one but I'll take real world results over theories any day.
turbodroid said:
First post here, be easy on me. I love this Nexus S, my first android phone, but man this battery issue has really bothered me. I would wake up in the morning, take my phone off the charger and immediately be at 96%. After 15 minutes of checking emails and surfing, I would be below 90% by the time I got to work an hour later. I was spending half the day charging my battery, so I decided to order 2 OEM batteries and a wall charger off Ebay.
Well little I did I know that this would solve two problems. First, the wall charger charges the batteries to 100% and provides significantly more life. For some reason the phone does not let the battery truly get to 100%. Second, when I get home from work or wherever, I can just pop in another battery and be fully charged again. Now I don't have to sit and worry about charging my battery all the dang time, and my batteries are lasting much longer to boot using the wall charger. I am not sure I can post links yet, so what I ordered was an M9P wall charger for like $10 and a couple extra OEM batteries for $10/per on Ebay. I ordered from US sellers so I didnt have to wait weeks also. You might be able to find cheaper if you order from a hong kong seller. Anyway, I hope this helps someone as frustrated as me.
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Battery life is actually pretty good on this phone. Try owning the evo. I never seen a phone with worst battery life.
turbodroid said:
From what I am seeing and how much longer my battery is lasting, I am getting a fuller charge and WAY longer battery life charging batteries in the wall charger. I had the same issue as many others with this phone. The battery wouldn't charge to 100% and general battery life is pretty poor. I thought my phone was bad so I exchanged it and the battery life was identical.
I recommend everyone who questions my results, if you have a spare $20 and are sick of the poor battery performance of this phone to get a wall charger and spare OEM battery off Ebay or wherever. Theories are nice and everyone has one but I'll take real world results over theories any day.
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Hey Turbodroid,
Can't find this wall charger of which you speak. If you can't post a link, please give more info on it so I can search for it. That and the batteries as well.
Thanks
ClrDaLane said:
Hey Turbodroid,
Can't find this wall charger of which you speak. If you can't post a link, please give more info on it so I can search for it. That and the batteries as well.
Thanks
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I can't post links yet, but I sent you a PM. On Ebay, search for M9P Charger and the only result that comes up is the one you want. Then search for OEM Battery Nexus S and pick whatever one you want.
EDIT - Here are the links I used
Charger - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=150546613705&ssPageName=STRK:MEWNX:IT
OEM Battery - http://cgi.ebay.com/NEW-OEM-GENUINE...199674?pt=PDA_Accessories&hash=item20b6d2767a
turbodroid said:
From what I am seeing and how much longer my battery is lasting, I am getting a fuller charge and WAY longer battery life charging batteries in the wall charger.
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Click to collapse
"WAY longer battery life"? Really really? I'm having some trouble believing this. The standard battery is 1500mAh. Are the extra batteries the same capacity? Because we are talking about something around 4-6% more power here.
This is either confirmation bias or blatant advertising.
Edit:
Fun fact: These two listings are from different sellers, but both write "Samusng" instead of "Samsung".
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=150546613705&ssPageName=STRK:MEWNX:IT
http://cgi.ebay.co.uk/M9P-Battery-Charger-Samusng-Google-Nexus-S-/180611094933
shrivelfig said:
"WAY longer battery life"? Really really? I'm having some trouble believing this. The standard battery is 1500mAh. Are the extra batteries the same capacity? Because we are talking about something around 4-6% more power here.
This is either confirmation bias or blatant advertising.
Edit:
Fun fact: These two listings are from different sellers, but both write "Samusng" instead of "Samsung".
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=150546613705&ssPageName=STRK:MEWNX:IT
http://cgi.ebay.co.uk/M9P-Battery-Charger-Samusng-Google-Nexus-S-/180611094933
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Obviously i'm not advertising, I am just posting my observations. My battery is lasting several hours longer than it did before under similar use. Right now I'm going on 6.5hrs of light use and I'm still at 81%. The OEM batteries I bought show the exact same part # as the one that came in the phone, but say 1440mah instead of 1500. I'm not observing any difference in how long they last compared to the original battery as today I am on the 1440 one.
I've been in the IT field for 18+ years. I know the difference between real results and 'confirmation bias'. These are real results I have experienced. You are more than welcome to share yours if you choose to spend $20 and duplicate what I did.
turbodroid said:
My battery is lasting several hours longer than it did before under similar use.
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I don't believe that unless your wonder-charger is literally cooking the batteries to death by some serious over-charging.
Right now I'm going on 6.5hrs of light use and I'm still at 81%. The OEM batteries I bought show the exact same part # as the one that came in the phone, but say 1440mah instead of 1500.
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So, the original battery to 1500mAh, charged to 96% in the phone would give ... 1440mAh. And range anxiety.
But the extra batteries, charged to 100% in the wonder-charger would give ... 1440mAh. And a peaceful feeling.
Yeah, I don't really see the "WAY longer battery life" here. If those 4-6% extra charge gives "several hours longer" then a full charge would be good for a couple of days of use anyway. And yet you were "spending half the day charging your battery". There's something odd about your story. The numbers don't really add up.
I've been in the IT field for 18+ years.
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I don't care if you're Isaac Newton. If you're starting to wave credentials and diplomas around, then this will be nothing more than a pissing contest. If that is what you want, then you win. Here, have an internet.
I know the difference between real results and 'confirmation bias'. These are real results I have experienced. You are more than welcome to share yours if you choose to spend $20 and duplicate what I did.
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No thanks. I have that exact same charger, and an extra original battery. If that charger actually makes that much of a difference, I don't want to cook my spare battery to death with it.
But feel free to back your claims by some real numbers taken from, you know, objective tests. One battery charged in the phone, the other in the wonder-charger. Then do the exact same thing (play music or whatever) until the batteries hit 15% remaining. Then post the elapsed times here.
Your condescending tone isn't worth my breath. My results are my results and I wished to share them with other people having battery issues and what I did to resolve them. I will continue 'cooking' my $10 batteries to a full charge and having a phone last several hours longer than it did before I started 'cooking'. You can do whatever with yours. Good luck to ya buddy.
turbodroid said:
Your condescending tone isn't worth my breath. My results are my results and I wished to share them with other people having battery issues and what I did to resolve them. I will continue 'cooking' my $10 batteries to a full charge and having a phone last several hours longer than it did before I started 'cooking'. You can do whatever with yours. Good luck to ya buddy.
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You know this isn't your blog or twitter feed to promote what you're doing.
Just like what you said, you're new to XDA so I wouldn't be too fond on trusting you either because you haven't been around too long.
I'll continue to stick to my battery. Grats on your long battery.
I go a full day with heavy use on my stock battery. Not sure what your problem is. Unless you can put up some real numbers though, this thread is not worth anyone's time.
After ordering both an OEM battery and the M9P charger I can confirm this.
I don't have screenshots yet, but The stock battery and the replacement OEM batteries I ordered. Function at around 4-6 hours more on the wall charger. With the stock charger charging my stock battery, I was seeing around 16-19hours with heavy use(phone and phone+bluetooth/text/web/youtube) with the M9P charger charging the battery, I have seen roughly a 4-6 hour improvement in battery life depending upon the usage change(i.e if i'm playing angry bird or NFS Shift along with other normal stuff)
I am, however, convinced the pulse charging vs. trickle charging done by the stock charger won't shorten the battery life. Plating will be come a real problem later on down the line, but with any smartphone, I don't expect to keep a battery longer than a year with my use before i either replace the phone or the battery.
If you guys want battery history shots, or whatever you might need to to help you get a better picture of what's going on, please let me know. I'd be happy to provide them.
Arasin said:
After ordering both an OEM battery and the M9P charger I can confirm this.
I don't have screenshots yet, but The stock battery and the replacement OEM batteries I ordered. Function at around 4-6 hours more on the wall charger. With the stock charger charging my stock battery, I was seeing around 16-19hours with heavy use(phone and phone+bluetooth/text/web/youtube) with the M9P charger charging the battery, I have seen roughly a 4-6 hour improvement in battery life depending upon the usage change(i.e if i'm playing angry bird or NFS Shift along with other normal stuff)
I am, however, convinced the pulse charging vs. trickle charging done by the stock charger won't shorten the battery life. Plating will be come a real problem later on down the line, but with any smartphone, I don't expect to keep a battery longer than a year with my use before i either replace the phone or the battery.
If you guys want battery history shots, or whatever you might need to to help you get a better picture of what's going on, please let me know. I'd be happy to provide them.
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Thanks for confirming my results. I was very displeased with the battery life of this phone, but since I went to the wall charger and just swapping batteries, I am getting a full 24hrs use and still have 10-20% left when I swap before work every morning. All in all a pretty cheap investment for the gains.
I am not seeing any noticeable difference between the 1440mah and 1500mah batteries either.
Just wanted to post my experience about battery life. It lasts almost two days (I switch off my phone for six hours every night). It wouldn't charge more than 95-96% every time. And it took really long time to charge too, with the oem charger. And then I tried my wife's Nokia charger, which is also 5V output but 1200mA instead of 700mA the oem is. And charged it turned on. And there it was! A bit less charging time, and for the first time it said 100% charged. That happened the last 6 charges with the Nokia charger. I hope I am not damaging the battery with what I'm doing. I can't say it lasts more than before. Nothing noticable. But at least it's fully charged and it doesn't take all day to charge.
i get 100% everytime when i unplug it will either drop to 97% or to 96% but will still last a whole day of use. i dont charge my battery unless it turns red with the X or till it shuts itself off.
I have always thought that the amperage of a battery made no difference to the voltage due to the factory adjusting the internal resistance of the battery. Amperage I understood was measured in current, however, which does have an effect on overall voltage.
Recall:
V = I * R
With electronics, it is my understanding that the mAh battery doesn't matter as long as the voltage is the same, although you'd get less longevity out of a 1650 mAh vs a 1440 mAh.
Thus, I believe this battery would work. Thoughts? The part number matches exactly what was in my Nexus S and the batteries look identical. If this is the case, save yourself some money buy not searching Nexus S battery and instead searching ab653850ca in eBay instead of paying $30-$40 for a new/replacement Nexus S battery when they are the same thing.
http://cgi.ebay.com/NEW-OEM-SAMSUNG...Accessories&hash=item3a5dd479e2#ht_1287wt_900
Thoughts? Both are 3.7 volts.
mAh is a unit of electric charge, not current (notice the 'h' making it milli-Ampere-hour). So, yes, a lower mAh battery will definitely work, but it will last less time.
Also (just trying to explain better) a battery is not a "powered resistor", so the relationship between its voltage and its current is not just ohm's law (the one you recall). More specifically, the 3.7 volts is due to the chemical reaction inside the battery and is more or less fixed (although it decreases as the battery discharges). The current flowing is basically a function of the load of the battery, so it changes according to what parts of the phone are working at that moment. The output resistance of the battery is a formal way of describing how close the battery is to an ideal voltage source and is not related to the amount of current it's actually providing.
Sorry if I was not clear enough, it's late here!
Missed the h. Not sure why, I see mA all the time and I just missed the h. Interesting and helpful. Thanks man. Clear to me.
That's strange, if it is the same model (AB653850CA), why is it only 1440mAh? But I'm sure it will work.
All I know is that this Samsung Moment battery I got off of Amazon for $6 is almost as good as my stock battery.
Sent from my Nexus S using XDA Premium App
The 1440mAh batteries work perfect, I have 2 of them. While you are at it, buy a wall charger to charge them in so they will charge to 100%. Having 2 spares means you will always have a FULLY charged battery to pop in and never have to tether the phone to a charger. Plus you get 2 to 4 extra hours of use.
Very informative!
turbodroid said:
Plus you get 2 to 4 extra hours of use.
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What do you mean by that ? That the 1440 mAh battery only gives you 2-4 hours ? I doubt it lasts so little time. I hope it doesn't.
No he means charging the batteries in an external charger gives them a more complete charge as I find the same thing. I've got 2 genuine batteries and a third on the way and the external charger charges them to 100% whereas the phone only charges them to around 95%. The batteries charged in the external charger last longer than those charged in the phone.
Hard to know when you're legitimately getting a battery with "more capacity" though, so I just assume I'm always buying another stock battery anyways.
maltloaf said:
No he means charging the batteries in an external charger gives them a more complete charge as I find the same thing. I've got 2 genuine batteries and a third on the way and the external charger charges them to 100% whereas the phone only charges them to around 95%. The batteries charged in the external charger last longer than those charged in the phone.
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Oh, I got it, thanks !
Anyway, for 6$, I think I'm going to buy one, too. Coupled with the 2nd battery dock, it should work flawlessly.
Hey guys,
I went ahead and ordered one of these too. I noticed that the Watts/hour is 5.55 on the Nexus S battery but on the battery I ordered (but have yet to get in) it says 5.3. Is this going to make a difference outside of how long the battery lasts?
If you guys buy one of these 1440s report back with what you've found out.
And if this is a success, then please urge XDA to sticky this thread or put this on the main page. Paying $50 for a second/replacement Nexus S battery is outrageous, and if this saves my fellow XDA members $45, more people should know about this. :]
UPDATE:
Looks like turbodroid already ordered these and said they work great! Thanks guys! Thank me if this was helpful.
Got it from eBay.
Charges faster in phone...while using!
If battery is around 40% it being be charged overnight.
Anyone else experience this?
could be the amp? maybe below 1 amp? Samsung charger has 2amps om it. check your charger and look for the amp. btw. the lower the amp the better for your battery..
Buy an OEM charger. The Samsung one is $50 from Samsung website but you can get the Asus charger from Google play store for $25. Both are two ampbi believe. Or you can get the 1a for $25 from samsung. Getting OEM directly from an OEM or authorized reseller or a storefront lime Google is key. Getting cheap chargers is gonna bite you in the ass one day or think about it like this. Why keep wasting time buying cheap chargers again and again when you can put up proper money and get quality in one go and have peace of mind for a few years. I even stopped buying chargers from amazon because they're just cheap knockoffs too. Phi hong makes good chargers and power supplies but they are harder to source. Phi hong came with my nexus one andy galaxy nexus OEM Home dock.
Anyways, aside from that part of the reason for slow charging is you probably have an unsafe charger that is not rated what it really is and is made of poor materials. Getting a quality 1a or higher, preferably 2a in this case and your gnote2 should charge @ 1.8a. In other words, you can charge from zero to full in ~2-2.5 hours. Or from partially full to 100% in less than 2 easily.
Sent from my GT-N7100
Unless I am mistaken, OP is referring to battery chargers, not usb chargers. That's how I charge mine, too. I have spare batteries, and they all get charged directly. When my battery is low, I just swap. I hate having my phone attached to a cord, even at night.
Yes, all the battery chargers I've had for every device (including this one) have been lower amp than the usb chargers supplied with the phone. It is especially slow for this huge battery for the Note 2. While it bothers me in concept, it's never actually been an issue for me, so I haven't done anything about it. I don't know if higher amp battery chargers are available, but I don't feel like spending extra money on one.
As far as battery health goes, charging at a lower amperage certainly isn't hurting the battery. If anything, it's actually better for it.
Yes...charging just the battery with wall charger.
@ 40% it will not be charged at 6am when I wake!!!
Are there better wall chargers?
Why do you hate having your phone attached to a Cord overnight. I heard that's fine and do it every night.!
dan_tm said:
Unless I am mistaken, OP is referring to battery chargers, not usb chargers. That's how I charge mine, too. I have spare batteries, and they all get charged directly. When my battery is low, I just swap. I hate having my phone attached to a cord, even at night.
Yes, all the battery chargers I've had for every device (including this one) have been lower amp than the usb chargers supplied with the phone. It is especially slow for this huge battery for the Note 2. While it bothers me in concept, it's never actually been an issue for me, so I haven't done anything about it. I don't know if higher amp battery chargers are available, but I don't feel like spending extra money on one.
As far as battery health goes, charging at a lower amperage certainly isn't hurting the battery. If anything, it's actually better for it.
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rockky said:
Why do you hate having your phone attached to a Cord overnight. I heard that's fine and do it every night.!
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Not for the phone, for me. It just bothers me having a wireless device locked to a wall. There's no reason for it. And I frequently get up in the night for various reasons (kids, work, insomnia, etc), and it bugs me unplugging in the middle of a charge cycle.
Incidentally, a non-removable battery was a deal breaker, and one of the reasons I didn't get a Nexus 4. I got used to never plugging in my last phone, and I don't want to go back. It was torture the first week or two with the N2 before my spare batteries arrived.
The charger should have its output printed on it, I've had a look at the pics on ebay and the first two I found that I could read were 500mA and 350mA, the original charger is 2A or 2000mA. Samsung make there own battery charger http://www.samsung.com/au/consumer/...es/EB-H1J9VNEGSTD?subsubtype=other-multimedia the output is 1.7A so much closer to the original usb charger.
I'd be worried about my back cover getting loose doing what you do. I had three batteries for my old phone, but I did not swap them on a daily basis, just when travelling or away from power for an extended time. I've ordered some wireless chargers so I can have one by my bed and another downstairs. I know they only output 500mA too, but for an overnight charge thats fine for me. I dont think there is any issue with interrupting the charge cycle, the two main enemies of lithium batteries are heat and being totally/almost discharged on a regular basis. Its best to keep them topped up.
scote said:
The charger should have its output printed on it, I've had a look at the pics on ebay and the first two I found that I could read were 500mA and 350mA, the original charger is 2A or 2000mA. Samsung make there own battery charger http://www.samsung.com/au/consumer/...es/EB-H1J9VNEGSTD?subsubtype=other-multimedia the output is 1.7A so much closer to the original usb charger.
I'd be worried about my back cover getting loose doing what you do. I had three batteries for my old phone, but I did not swap them on a daily basis, just when travelling or away from power for an extended time. I've ordered some wireless chargers so I can have one by my bed and another downstairs. I know they only output 500mA too, but for an overnight charge thats fine for me. I dont think there is any issue with interrupting the charge cycle, the two main enemies of lithium batteries are heat and being totally/almost discharged on a regular basis. Its best to keep them topped up.
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It looks like the OEM battery charger is available on ebay for around $15. That's good to know in case mine ever crap out on me. These cheapies that I get tend to.
As far as the back cover getting loose, after 3 months, it is a little bit looser than when it was new. 1.5 years with my G2x didn't loosen it at all, but the build quality on that thing was fantastic. I keep this in a case anyway, so it being a little looser goes unnoticed. If it gets bad, back cover replacements are cheap.
If one of the devs can make the kernel capable of fastcharge, it would not take but half the time to charge. Yank who is working with Faux on his kernel, helped make the kernel fast charge capable.
Sent from my SGH-T889 using xda app-developers app
UnixSlayer said:
If one of the devs can make the kernel capable of fastcharge, it would not take but half the time to charge. Yank who is working with Faux on his kernel, helped make the kernel fast charge capable.
Sent from my SGH-T889 using xda app-developers app
Click to expand...
Click to collapse
But what is the point of having it charge fast, when all it is is going to drain faster?
I charge mine overnight with a charger rated at 750mah I believe and it last me a whole day. As oppose to using a 2.1 am charger I have, where the battery percentage would start dropping by the first hour.
Correct me if I am wrong here, but this is what I've notice with my last few phones.
The Perseus kernel with stweaks has the ability to change the charging parameters.
With it overclocked/undervolted I am getting better life than I did on stock.
Not for sure what you mean as it depleting the charge faster on a higher amperage charger. Kind of sounds like you may have had failing batteries, etc.
There seem to be a few misunderstandings here regarding batteries and chargers.
1) The charge rate, when the battery is in the phone, is controlled BY the phone. The charger itself just supplies regulated power to the phone. How much current is put into the battery at any given time is up to the phone, which is why kernels can do things like fast charge, it's controlled by the kernel. Now, the reason the battery charges faster when using the stock charger vs. something lower current or a computer is simple. The phone can detect what it's connected to within some limitations. It sounds like our phone can also sense the incoming voltage levels and back off if the supply becomes unstable.
2) Using the stock 2A charger is "harder" on the battery than a lower current charger. Not true, at least not within any margin of error you will be able to detect without specialized equipment. Lipo batteries are generally built to charge/discharge at 1C. C in this case stands for capacity. So our 3100mah batteries can charge at 3.1Amp and be within safety margin. So the 2Amp charger the phone comes with is perfectly fine for the battery. Without seeing a datasheet for the battery from Samsung, that's a good guess. And again, the phone controls the charge current based on a number of parameters. You could connect the phone to a 5V supply capable of 100Amp and it will still only use what it needs.
3) The percentage readout on the phone screen is a GUESS. Don't pay it too much attention. For this same reason, evaluating 3rd party batteries based on phone runtime etc is not useful. To validate the battery capacity with any accuracy requires a test setup discharging the battery through a known load and measuring how long it takes to get to a cutoff voltage. I've done some of these tests myself on stock and 3rd party batteries. In general, the OEM batteries are always at or above spec, the 3rd party battery manufacturers lie. Often by upward of 20%. Even the high $ batteries. Keep that in mind when shopping if you want extras or extended batteries.
4) Interrupting the charge cycle is bad. Nope. It's fine. On this same line of thought, full cycles ARE bad. Don't do it. Don't think too much about it either though. Just plug it in when convenient. Or set it on the wireless charger if you've installed one. Generally speaking, they actually don't like to be charged to 100% either. Keeping it at 20%-80% is actually best for the longevity of the battery cell itself. In practice, you will probably have a new phone before any of this is actually noticeable.
The OP sounds like they are talking about a stand-alone charger, where the battery is not in the phone. Those will vary wildly in quality and capability, particularly from ebay. They are probably cheap POS devices. Not that that's really a bad thing, just know about it. It's probably a very low charge rate device, perhaps even down to 100ma or so. That would take forever to charge our larger batteries. As for if there is a better one, probably. If Samsung makes one, it will probably charge faster than the phone with the provided charger plug as there would be no load from the phone using power. Of course, it will cost a lot more as well. Look for devices that at least claim they will charge at 2Amp or so. In practice, they will probably be a lot lower, but your chances are improved. Not many people will break out an ammeter and check, after all.
UnixSlayer said:
If one of the devs can make the kernel capable of fastcharge, it would not take but half the time to charge. Yank who is working with Faux on his kernel, helped make the kernel fast charge capable.
Sent from my SGH-T889 using xda app-developers app
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Click to collapse
Perseus kernal has fast charging settings.
What ttabbal wrote is mostly correct. But the problem lies within some input voltage protection logic tied to the charger chip of the phone which is extremely (and too much so) sensitive.
rsalan said:
Perseus kernal has fast charging settings.
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Can people stop calling it fast-charge, it's an idiotic term which technically means nothing. While most kernels have some sort of charging speed configuration options, they're all useless in regard to this problem as the current in the end is decided by a different logic. You'll have to disable unstable power detection and that's the only way to make it work and fix the problem, unless you go hunting down high quality cables and chargers.
Personally I also encountered the problem as my stock S3 charger, as many others here have reported, has deteriorated and it would only charge at an effective 300mA. I disabled unstable power detection and now it charges at the full given current limits, without any issues.
rockky said:
Got it from eBay.
Charges faster in phone...while using!
If battery is around 40% it being be charged overnight.
Anyone else experience this?
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You have to make sure it's "2a" charger capacity. It happened to me once. Go to monoprice.com and search for a universal 2a charger... pretty cheap
Who has one
Dont really need one imo but ill be checking out the zero lemon 9300 mah battery once its available sometime in april for $40.
http://forum.xda-developers.com/showthread.php?t=2175695
Sent from my SPH-L900 using xda premium
I picked up a 7960mah battery today it was only 50 % so I won't know how long it lasts until tomorrow will give it a full charge overnight it is big but the back case is better looking then the one I had on the original note, I actually did pretty good today for $60 I got this extended battery an otter box commuter case a samsung flip case and a samsung desktop dock not bad
golfinggino said:
I picked up a 7960mah battery today it was only 50 % so I won't know how long it lasts until tomorrow will give it a full charge overnight it is big but the back case is better looking then the one I had on the original note, I actually did pretty good today for $60 I got this extended battery an otter box commuter case a samsung flip case and a samsung desktop dock not bad
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What?!? Links, please!!!
These were all off kijiji there are no links tomorrow I am getting a back case modified for wireless charging and the charging dock so enough accessories for this weekend
golfinggino said:
These were all off kijiji there are no links tomorrow I am getting a back case modified for wireless charging and the charging dock so enough accessories for this weekend
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what's is kijiji? sorry, if its something you don't want to mention in the forum, you can PM me. I'm curious about that 8000 mAh battery. What size, double in height of original one? What brand? Can you confirm it's true capacity by peeling the label off? Pictures? Physically it can't be more than 6400 mAh if its double of OEM height, or more than 3200 mAh if its original OEM size. Really curious about the battery.
it is probably just a chinese copy - just google it - i did a quick search and found someone who got 11 hours screen on time with one of the same size so i thought i would give it a shot, paid $20 for it - might not even be worth that but who knows always can use it as an emergency back up battery - but i will do a test tomorrow from 100% and report back the screen on time
There seem to be a dozen or so out there. I would love to see reviews of any of the batteries listed below. I know from the work I did in this thread....
http://forum.xda-developers.com/showthread.php?t=1753726
...that Chinese batteries are very hit or miss, and there is often absolutely no correlation between the claimed capacity, and the true capacity.
The blunt reality, is that an extended capacity battery could have less capacity than the OEM cell. There were lots of cells tested in the thread above, that had under half the capacity of an OEM. It would be a shame to bulk up our phones with a double-thick battery, only to have less capacity than the OEM cell. So, any reviews out there?
(I'm not against doing another true-capacity battery shootout, this time for extended capacity Note II packs)
http://www.amazon.com/Anker-Extende...86811&sr=1-6&keywords=note+2+extended+battery
http://www.amazon.com/warranty-Exte...86811&sr=1-2&keywords=note+2+extended+battery
http://www.amazon.com/Hyperion-Exte...86811&sr=1-1&keywords=note+2+extended+battery
http://www.ebay.com/itm/EZOPower-Ex...166595?pt=PDA_Accessories&hash=item416ec34a83
http://www.ebay.com/itm/7500mAh-Ext...352576?pt=PDA_Accessories&hash=item43b6c7be80
http://www.ebay.com/itm/NEW-6500mAh...540684?pt=PDA_Accessories&hash=item4abe8dc00c
http://www.ebay.com/itm/7600mAh-Ext...016840?pt=PDA_Accessories&hash=item51a4f73ac8
http://www.ebay.com/itm/New-6500mah...541010?pt=PDA_Accessories&hash=item27d0b97a92
you are right it might be even less the the oem battery, i will run it from 100% tomorrow and post my results and some pics of the battery if anyone is interested, btw i am currently running the latest liquid smooth rom and soapkernel with pegasusq governor up to 1.92 ghz, i normally get around 5 to 6 hours screen on time under normal use, sleep is set to 1 minute, nfc is off, location services is on even though i dont really use it, brightness is on auto to the lowest setting - which is fine for me most of the time, i would say if it doesnt get 9 hours screen on time then it is not really worth it other then a spare back up battery for emergencys as it is quite bulky
rhd-android said:
There seem to be a dozen or so out there. I would love to see reviews of any of the batteries listed below. I know from the work I did in this thread....
http://forum.xda-developers.com/showthread.php?t=1753726
...that Chinese batteries are very hit or miss, and there is often absolutely no correlation between the claimed capacity, and the true capacity.
The blunt reality, is that an extended capacity battery could have less capacity than the OEM cell. There were lots of cells tested in the thread above, that had under half the capacity of an OEM. It would be a shame to bulk up our phones with a double-thick battery, only to have less capacity than the OEM cell. So, any reviews out there?
(I'm not against doing another true-capacity battery shootout, this time for extended capacity Note II packs)
Click to expand...
Click to collapse
My hat goes off to you!!!! Being a technical/detailed person myself, I absolutely enjoyed that write-up you have done for HTC Sensation. If you can do something like this for Note 2, that would be AWESOME!!!! As a matter of fact, I will let you borrow my Innocell (Seidio) 4500 mAh battery and another 4200 mAh "Gold" which I supposed to get in a few weeks. I don't have any hardware setup to make exact measurements, was just doing relative comparison when I was testing Innocell (check out link in my signature to all my accessory reviews).
Btw, do you mind posting a short write up with a few pictures of your setup to measure batteries? Maybe link to where I can get the equipment as well? I would really appreciate that!
vectron said:
My hat goes off to you!!!! Being a technical/detailed person myself, I absolutely enjoyed that write-up you have done for HTC Sensation. If you can do something like this for Note 2, that would be AWESOME!!!! As a matter of fact, I will let you borrow my Innocell (Seidio) 4500 mAh battery and another 4200 mAh "Gold" which I supposed to get in a few weeks. I don't have any hardware setup to make exact measurements, was just doing relative comparison when I was testing Innocell (check out link in my signature to all my accessory reviews).
Btw, do you mind posting a short write up with a few pictures of your setup to measure batteries? Maybe link to where I can get the equipment as well? I would really appreciate that!
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Click to collapse
That's a very kind offer!
I'm in Canada though, and one of the realities is that shipping to and from (mostly from) Canada, gets pretty pricey. I thought about doing this with batteries before (so that people could send me their cells for testing), but when I did the math, I realized that for less than the price of two-way shipping, I could just buy a new cell. It's unbelievable, but I can buy a cell from China, shipped to Canada, for a total price (including shipping) that is less than just the postage would cost me to re-mail the same cell to my next-door neighbor.
Maybe for the time being, we could at least collect a few recommendations. I've got a couple cells en-route already. I don't have a ton of cash to outlay on cells for a massive battery shoot-out, but I could certainly buy a couple. Any recommendations?
My setup -
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I use a VA Meter that came from a Chinese gadget site. Out of the box, it is wired to pull its own power from the battery you're testing. The unit can be modified (and I have done so) to take an external 5V supply instead, the benefit being that once the cell dies, the measurement unit itself doesn't loose power. I've run discharges of several cells through this meter, and into a proper hobby charger (set to discharge) in order to verify that the inexpensive VA Meter (it was under $15) is actually accurate. It is. The measurements were within 1% of the proper hobby charger. The reason I don't use the proper hobby charger for measuring smartphone batteries, is that smartphone batteries discharge down to 2.5V before their protection kicks in. Hobby chargers (or at least mine) dislike that practice, and end the discharge cycle at 3V. The setup above, allows me to test all the way down to 2.5V before the battery's protection kicks in.
The funky looking thing with a fan is the test load. It's very much "overkill" for this type of testing, but I use the same setup to test up to 16V @ 2A packs, and that creates heat that needs to be dissipated actively. The circuit you see on the test load is a boost/buck circuit that does nothing other than supply the constant 12V to the fan, regardless of what voltage input it receives. Inside the test load, there are two 50W axial mount resistors, of different resistances, that I can selectively choose to discharge into, depending on what I'm testing.
Finally, those little clip leads are essential for connecting to the actual cells. For the Sensation testing, I actually made a little proprietary clip from a piece of PCB and solder blobs, that I would rubber-band onto the cells. These clips work much much better.
so i have tested the 7960mah battery that i picked up yesterday - i would say it is at least double of the oem battery, i have been using the phone alot today - downloading roms and torrents, xda, etc. so the screen has been on most of the day - you could run the whole day with the screen on the entire time if you really wanted to do and still make it through the day without having to charge it, i am just about to plug the phone into my computer as i need to get some files of it and also want to test out the wireless charging unit that i picked up today and flash a new rom - but here are the stats from today
the phone has been running on battery for 10 hours
screen on time 8 hours
battery remaining is 41%
i would not use this on a regular basis as it is a lot bigger but if you really needed the extra time then it will certainly deliver - the only time i would ever need this much battery is on the weekends when i am downloading alot, etc, so the screen is on almost the entire time
hope this helps anyone that is thinking of getting one decide
Since I'm waiting for 4200 mAh battery, presumably advertised as "oem replacement", I searched a couple more on-line places that sell the same "Gold" battery. Actually found 2 other on-line HK retailers that sell it with an actual disclaimer that its "4200 mAh battery, but you will not get more than 3100 mAh out of it" lol!!! What is funny, even with that disclaimer, they sell 3100 mAh replacement for about $4 while 4200 mAh replacement is $8 and a disclaimer of the same performance as 3100....
@golfinggino: is there a way to peel the label off your 7960 mAh battery? I have a feeling its probably a double capacity "stacked" 6200 mAh battery. Still great to have extra capacity when you need it, although with these double capacity batteries you don't get a good case. Per my review of Seidio's Innocell (link in the signature), they actually came up with a special version of ACTIVE case for their battery, but it's only 4500 mAh rated (although I found it to be of a higher capacity) and I don't understand why wouldn't they make it as a true double capacity.
Also, a general question to everybody, why wouldn't anybody talk about external battery banks?!? Wouldn't that be so much more easier to have a small charged up pack to hook up your phone too for a quick recharge? There are some that deliver true 2A output with capacities of 6 Ah up to 13 Ah and more. Anker, Exogear, and Yoobao make some quality slim external battery banks.
i am pretty sure it is probably just a double stacked batttery as i had one on my original note and that is what it had - i will see if i can peel off the label and check without ruining it - problem is i sell most of the android devices i have within a week or 2 and buy something new so i dont want to rip it all up ! this extended battery lasts alot longer then the extended battery i had in the original note that is for sure
rhd-android said:
...I'm in Canada though, and one of the realities is that shipping to and from (mostly from) Canada
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Understood, makes no sense to ship back'n'forth.
rhd-android said:
I use a VA Meter that came from a Chinese gadget site.
Click to expand...
Click to collapse
I'm not too familiar with battery operation, but can find my way around electronics
So in theory you have a close loop (without taking into account ext power of VA meter and heatsink fan), with Battery, VA meter, and Rload in series? What is a value of Rload required for this measurement?
And then, you watch VA meter and time it until the voltage reading drops to 2.5V? What is the actual formula to calculate A/h? Do you need to monitor both Voltage and Current through VA meter? I have a regular multi-meter, but obviously can't monitor both at the same time without turning knob dial, and its battery operated so it will time out after awhile. Can a use multi-meter which plugs into a power outlet or do I need the actual dual display VA meter? I guess if you can show me the formula used to calculate mAh rate, I can figure out what I need for this setup.
I have one on my samsung galaxy s2 (t989)
Qcell 3650.
I couldn't live without it. Lasts a full day with heacy use + 4g + auto/low brightness. The stock battery barely made it to noon. I don't know how others can stand it.
I bought two Qcells, one for me and one for the gf. Both have performed well and can be found on amazon for $20 or so with a free cover.
Boy that sounds like a plug, but its not. I at one point was hunting for a good extended battery and found reviews online, so hopefully I am returning the favor for someone else down the road.
Sent from my SGH-T989 using xda app-developers app
vectron said:
Understood, makes no sense to ship back'n'forth.
So in theory you have a close loop (without taking into account ext power of VA meter and heatsink fan), with Battery, VA meter, and Rload in series? What is a value of Rload required for this measurement?
And then, you watch VA meter and time it until the voltage reading drops to 2.5V? What is the actual formula to calculate A/h? Do you need to monitor both Voltage and Current through VA meter? I have a regular multi-meter, but obviously can't monitor both at the same time without turning knob dial, and its battery operated so it will time out after awhile. Can a use multi-meter which plugs into a power outlet or do I need the actual dual display VA meter? I guess if you can show me the formula used to calculate mAh rate, I can figure out what I need for this setup.
Click to expand...
Click to collapse
Luckily, it's a lot easier than that!
The VA meter, is actually a "VAmAH" meter I don't know why they just call it a VA meter, because it has an actual function built right in for tracking mAH, no math required. The meter knows the voltage that is being dropped across its output, and the current that is flowing through it so it just tracks the mAH as that all happens.
The fan gets it's power from the circuit's output, just like the resistor does. So it doesn't really matter if the fans running or not. If it is, then the load draws an extra 10mA or so of current, which gets tracked just like all the other current going through the resistor. In practice though, I generally don't bother connecting the fact for small cells like these. The resistor is only burning 3 or 4 watts, and that's fine for air to dissipate.
Someone earlier had a question about battery banks / external packs, and why people don't use them. I do, I have a whole bunch. But they're awkward in that you have to carry cables, and connect cables to your phone. I would echo an earlier poster who commented on the shame of connecting a mobile device to wires. The only time I ever connect my smartphone to cable is (generally) on it's first day in my possession, when I have to get it working with custom ROMs. After that, I generally never hook my phone to a cable again - can't stand the awkwardness of wires.
rhd-android said:
Luckily, it's a lot easier than that!
The VA meter, is actually a "VAmAH" meter I don't know why they just call it a VA meter, because it has an actual function built right in for tracking mAH, no math required. The meter knows the voltage that is being dropped across its output, and the current that is flowing through it so it just tracks the mAH as that all happens.
The fan gets it's power from the circuit's output, just like the resistor does. So it doesn't really matter if the fans running or not. If it is, then the load draws an extra 10mA or so of current, which gets tracked just like all the other current going through the resistor. In practice though, I generally don't bother connecting the fact for small cells like these. The resistor is only burning 3 or 4 watts, and that's fine for air to dissipate.
Someone earlier had a question about battery banks / external packs, and why people don't use them. I do, I have a whole bunch. But they're awkward in that you have to carry cables, and connect cables to your phone. I would echo an earlier poster who commented on the shame of connecting a mobile device to wires. The only time I ever connect my smartphone to cable is (generally) on it's first day in my possession, when I have to get it working with custom ROMs. After that, I generally never hook my phone to a cable again - can't stand the awkwardness of wires.
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I see. So what is a value of the load resistor, a few ohms probably? Do you by any chance still have a link to that VA meter you got?
With external batteries, I think either Anker Astro 2 (1A/2A, 8400 mAh) or Exogear ExoVolt (2A, 5200 mAh, stackable!!!!!! or Yoobao (1A/1.5A, 13000 mAh) would be my top choices. I would probably think that Anker Astro 2 for $38 is the best solution in this case of price/capacity.
Oh, and I guess you a wireless charging setup then? If so, wouldn't that be only in one place, like home? While you are on a road, at work, in a car - don't you need to use micro-usb cable?
vectron said:
I see. So what is a value of the load resistor, a few ohms probably? Do you by any chance still have a link to that VA meter you got?
With external batteries, I think either Anker Astro 2 (1A/2A, 8400 mAh) or Exogear ExoVolt (2A, 5200 mAh, stackable!!!!!! or Yoobao (1A/1.5A, 13000 mAh) would be my top choices. I would probably think that Anker Astro 2 for $38 is the best solution in this case of price/capacity.
Oh, and I guess you a wireless charging setup then? If so, wouldn't that be only in one place, like home? While you are on a road, at work, in a car - don't you need to use micro-usb cable?
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I think I have a 10 ohm and a 5 ohm in there, that I can select between, or parallel or series. In practice I try to deplete smartphone cells at as close to 1A as possible when at full voltage (obviously because of ohms law, the rate drops a bit as the voltage falls).
I got 3 batteries 2 extended and one fake double cell from chinaI got off ebay.
One 7600mAh and anker extended 6200mAh.both from amazon
I ran nova battery tester in short for battery quick test.for the last 3 test.
the first test are uirrelevant due to the fact that that I had no bios for my phone model in nova at the time. That fourth one upis right when I got the anker and found the bios for my phone.then I ran the short test on the
Anker, 76, china at the end. Also I aged my extended 76 and it puts out 10hours continous on screen time.
My 76 I charge in the low run 350 +/-50mA china solo battery charger. 18 hours out put and at lleast about a days use or more . I charge one extended while im using the other but still I want more power I was wonder if any has made their own extended battery mod. Im thinking about adding the two extended battery on the back and putting them in series the make a suposive brickscreen device. With power for a week. Im looking fir easy make series some how .. but I digest.
Heres nova.