Database Develop

Does leaving plugged in harm battery?

I turn my phone on Airplane mode and unplug at night while I'm sleeping.
BUT! When at work and at home at other times, is it bad to leave it plugged in 100% of the time? (I.E. does it decrease total battery life over a few years to be constantly charging.)
Or is it better to unplug ASAP when it hits 100% and let it drop to 20-30% and recharge-unplug-recharge-unplug etc? (If so, how much of a difference would this make?)
And does it matter USB vs AC source? I know USB is half the amps, so this could have an effect too?

Honestly, the battery is going to deteriorate a bit either way over a year time span. It is probably best if you just replace the battery every year.

Paul22000 said:
I turn my phone on Airplane mode and unplug at night while I'm sleeping.
BUT! When at work and at home at other times, is it bad to leave it plugged in 100% of the time? (I.E. does it decrease total battery life over a few years to be constantly charging.)
Or is it better to unplug ASAP when it hits 100% and let it drop to 20-30% and recharge-unplug-recharge-unplug etc? (If so, how much of a difference would this make?)
And does it matter USB vs AC source? I know USB is half the amps, so this could have an effect too?
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Click to collapse
Doesn't matter. All you need to really be worried about is that you leave it on the charger long enough to get a true 100% charge, and you don't always put it on when at 80%, try and run it down from time to time to 10% type thing.
If you leave it on the charger 24/7 for a year, it will have no real effect on the battery that a year of use wouldn't do, and you might actually come out ahead since battery life times are based on charge cycles... when on charger, as you are asking about, there would be virtually no charge cycles.

pjcforpres said:
If you leave it on the charger 24/7 for a year, it will have no real effect on the battery that a year of use wouldn't do, and you might actually come out ahead since battery life times are based on charge cycles... when on charger, as you are asking about, there would be virtually no charge cycles.
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Ooooh, interesting... Did not know that. I thought that leaving it charging was the worst case possible.

But let's be honest.
How long do you think you'll keep the phone?
I've never had one more than a year...

Amdathlonuk said:
But let's be honest.
How long do you think you'll keep the phone?
I've never had one more than a year...
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Til the Nexus Two comes out bro
[Edit]: Well, my thinking is how BAD could this affect it. Like leaving it plugged in all the time = 50% battery capacity in 4 months type of thing. I guess that is not the case though eh?

Paul22000 said:
I turn my phone on Airplane mode and unplug at night while I'm sleeping.
BUT! When at work and at home at other times, is it bad to leave it plugged in 100% of the time? (I.E. does it decrease total battery life over a few years to be constantly charging.)
Or is it better to unplug ASAP when it hits 100% and let it drop to 20-30% and recharge-unplug-recharge-unplug etc? (If so, how much of a difference would this make?)
And does it matter USB vs AC source? I know USB is half the amps, so this could have an effect too?
Click to expand...
Click to collapse
To add to what pjcforpres said, I would suggest topping off the battery a couple times a day rather than always letting it run down to 20-30% (deep cycling) the battery. Deep cycling is worse for Li-ion batteries. It causes more heat for longer periods of time when you do charge. I would only discharge completely once every few months to keep the battery calibrated.
My personal habit is to top off frequently. If I'm at home, I'll let it charge to a true 100%, like pjc said, then take it off the charger and leave it off till it hits 75-80% and top it off again.

i can add to this discussion what i've learned about lithium-ion batterys
having it plugged in, while it is being taxed heavily (playing games) and already at 100% is a bad idea, then i discharges and recharges all over the time.
When it isn't full and you plug it in to top it off it shouldn't really do any harm, as long as you disconnect it when it's at 100%.
Emptying it completely also lowers overall capacity, 10% is a good threshold when to charge it.
When leaving it off to store it for a while, store it with around 70-75% in the battery. Storing it fully charged also lets capacity down.

creepinshadow said:
i
Emptying it completely also lowers overall capacity, 10% is a good threshold when to charge it.
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I thought you WANTED to do this? I've heard calibrating it is running it until it turns OFF?

Paul22000 said:
I thought you WANTED to do this? I've heard calibrating it is running it until it turns OFF?
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I respectfully disagree with creepinshadow's suggestions. I've read up on lithium ion batteries considerably in the last few years. 10% is not a good threshold to always charge your battery from... that's deep cycling and was great for nickel metal hydride, but isn't good for lithium ion. That said, there's no way for it not to get that low from time to time if you're away from your charger for extended periods and I'm sure it's not going to destroy your battery as fast as one might think.
As for storage, the I charge (or discharge) mine to 40-45% then pop it into the fridge for storage. Read that in a long article explaining how to treat li-ion batteries.
Like you said though, a full discharge for calibration is running it till it turns off then plugging it in while keeping it off until an hour or so after the light turns green.

I've heard many people say that leaving any device that has a battery plugged in won't harm it as long as you're consistant with the charge cycles. Like only plug in your phone when the battery life is >15% and charge it to 100% before unplugging it.
I get into trouble there, because (for instance) say I'm going to be going into the mall for a while and my battery is at 30% and it's going to take me 30 minutes to get the mall (I live in Northern Virginia, traffic is a *****, haha). I'll hook up my phone while I'm in the car just to have extra battery life while I'm away from a charger.

good question, i wanted to know the exact same thing so good to see someone else ask. got the answers i needed.

Look guys... the reality is that this discussion is really just academic. Take my recommendations, for example. It would be ideal if everyone could do what the study I read suggested, but it's not practicable to always top off the battery and not deep cycle the battery frequently. That being said, I'm sure the difference in battery life wouldn't be apparent for a very long time. I can't imagine phone and battery manufacturers haven't thought about this. So...while I've posted my "recommendations" based on that study... just enjoy your phones.

A new battery cost <$50 i'm sure... If you left your phone plugged in over night, every night for a year it probably won't hold a charge better than someone that unplugs in once it reaches 100%..
I personally would rather not deal with always worrying about over charging it and IF i still had the phone when the battery needs to be replaced, just replace it.
In the past 16 months i've had the Touch Pro, Palm Treo Pro, BB Bold & now the N1.. so i never have a phone long enough to even care lol.

I guess that's true. We can always replace the battery, unlike the Fruit people!
But I was just worried that the damage happened quickly. But I guess it's 9-12 months before seeing any real effects anyway.

scottypimpin636 said:
A new battery cost <$50 i'm sure... If you left your phone plugged in over night, every night for a year it probably won't hold a charge better than someone that unplugs in once it reaches 100%..
I personally would rather not deal with always worrying about over charging it and IF i still had the phone when the battery needs to be replaced, just replace it.
In the past 16 months i've had the Touch Pro, Palm Treo Pro, BB Bold & now the N1.. so i never have a phone long enough to even care lol.
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Actually, it's only $25 from Google.

uansari1 said:
Actually, it's only $25 from Google.
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Link?
I don't see an accessories page at www.google.com/phone
[Edit]: lol nevermind, you have to click "Get your phone" to get accessories haha

Paul22000 said:
Link?
I don't see an accessories page at www.google.com/phone
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Lol... click on the link you posted, click "Get Your Phone" and it's listed right below the Dock!

uansari1 said:
Lol... click on the link you posted, click "Get Your Phone" and it's listed right below the Dock!
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Yeah just saw that. Kind of silly to put it there since people looking for accessories already HAVE a phone. Silly Google

Oh, so by the way, this page brings up a good point:
http://www.google.com/support/android/bin/answer.py?hl=en&answer=175535
Charges at 480mA when installed in Nexus One phone connected to USB, at 980mA when installed in phone connected to charger
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Is there any difference in charging from USB vs AC adapter in terms of how it affects overall battery life?

Battery to 100% - Required Parts

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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"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.

My HTC One just got here. Do I need to charge it fully?

Or do I need to let it die completely before charging? What do I need to do?

melted_cow said:
Or do I need to let it die completely before charging? What do I need to do?
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no just use it

melted_cow said:
Or do I need to let it die completely before charging? What do I need to do?
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use it fully untill it drains completely, then charge it to 100% , then use it fully 2 or 3 times and fully charge it.
then just use it like normal and charge like normal

Phil750123 said:
use it fully untill it drains completely, then charge it to 100% , then use it fully 2 or 3 times and fully charge it.
then just use it like normal and charge like normal
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That's an interesting dance that hasn't been relevant for over a decade. Interesting that you got a thanks but the correct answer didn't.

Phil750123 said:
use it fully untill it drains completely, then charge it to 100% , then use it fully 2 or 3 times and fully charge it.
then just use it like normal and charge like normal
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Please do not follow this advice. This used to be the best way to stop NiCad batteried from developing low capacity 'crystal memory' but it is not the case with LiOn or LiPo batteries, in fact, quite the opposite. Doing as he recommends is much more likely to damage the battery and even start a fire.
A LiPo shouldn't be discharged by more than 80% if at all possible. If you want to know more there are a lot of links on the interweb but here's a typical thread on stack exchange .. and a quote from it ...
http://android.stackexchange.com/qu...-first-time-charging-on-li-ion-batteries-myth
Nowadays, batteries are often Lithium-Ion or Lithium-Polymer and such batteries (as I have read many times and based on my own experience) would be stronger if you charge them often. The first time charging and "wait-until-full-discharge-before-recharge" and "don't-use-when-charging" are not applicable to these modern batteries.
Li-Ion and Li-Polymer batteries, if charged often, after about 1 month, would reach to their maximum performance, and you are recommended to charge them every time you find an outlet!
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and another ... http://android.stackexchange.com/qu...e-battery-discharge-fully-or-as-low-as-possib

radiotrib said:
Please do not follow this advice. This used to be the best way to stop NiCad batteried from developing low capacity 'crystal memory' but it is not the case with LiOn or LiPo batteries, in fact, quite the opposite. Doing as he recommends is much more likely to damage the battery and even start a fire.
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Wow, now we have the Richard Dawkins of battery advice. Well done.
Can everybody just calm the funk down and charge their batteries as and when they see fit? It's fine. Either way.
There is circuitry inside the battery that will prevent them from over charging, under charging, over discharging catching fire and generally behaving badly. There is also no memory effect. Just charge them when you think you'll need them.

Yeah just keep using it, if one day in the distant or not-so-distant future it doesn't turn on for some reason and/or seems unresponsive, it might need charging.

Phil750123 said:
use it fully untill it drains completely, then charge it to 100% , then use it fully 2 or 3 times and fully charge it.
then just use it like normal and charge like normal
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BenPope said:
Wow, now we have the Richard Dawkins of battery advice. Well done.
Can everybody just calm the funk down and charge their batteries as and when they see fit? It's fine. Either way.
There is circuitry inside the battery that will prevent them from over charging, under charging, over discharging catching fire and generally behaving badly. There is also no memory effect. Just charge them when you think you'll need them.
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Hmmm .. shows how out of date I can get ... I didn't realise that the overcharge protection had reached such a state of sophistication ... Personally I never bothered with battery regimes, even in the bad old NiCad days ...
Thanks for the correction.

The overcharging prevention was first introduced to the Sensation and EVO 3D phones. I remember when I started seeing it because I would leave for work, and sometimes my battery wasn't charged fully. What it was doing was charging to 100%, then stops charging and will let it discharge 5%, then start charging again. And it would keep doing it until I took it off the charger. I've yet to see my EVO 4G LTE do that, though. Maybe it's been refined so that we don't notice it as much?

eXplicit815 said:
The overcharging prevention was first introduced to the Sensation and EVO 3D phones. I remember when I started seeing it because I would leave for work, and sometimes my battery wasn't charged fully. What it was doing was charging to 100%, then stops charging and will let it discharge 5%, then start charging again. And it would keep doing it until I took it off the charger. I've yet to see my EVO 4G LTE do that, though. Maybe it's been refined so that we don't notice it as much?
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Wrong. Even early smartphones had overcharging protection. My old HTC Desire definitely had it.

BenPope said:
Wow, now we have the Richard Dawkins of battery advice. Well done.
Can everybody just calm the funk down and charge their batteries as and when they see fit? It's fine. Either way.
There is circuitry inside the battery that will prevent them from over charging, under charging, over discharging catching fire and generally behaving badly. There is also no memory effect. Just charge them when you think you'll need them.
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Click to collapse
On the note of over-discharging: just because there is circuitry inside the battery to prevent over-discharging doesn't mean you should ever let your phone run down to (what your battery shows as) 0%. Yes, the phone will generally shut off when the battery is left at around 3v, but it's still possible to force turn your phone on (which you should never do) after that point. Not to mention, leaving the battery at a low voltage for a significant period of time WILL affect the overall lifespan of the battery. Battery manufacturers will do what they can, but there is really no such thing as "true" over-discharge protection, as with overcharge protection, since batteries will still lose charge even when not in service.
Yes, if you let your battery run down to (what your phone shows) 0% occassionally, that is OK. But you should really only be doing that if and only if you need to re-calibrate for cell mismatches.

Hah! I still remember when I bought a mugen battery the instruction clearly says to discharge it fully and charge it fully for like 5 times to get optimum capacity Obviously I didn't do it. I am much aware of these things since good old Nokia 3310 days.

[Q] things to be done on battery after getting new htc one

I am new in HTC phones. I will get my htc one after 2 days, i mainly want to know about battery charging cycles. how can we do that to get maximum battery life. what is mean by battery calibration ? is the battery to be calibrated in every weak ? sorry for my bad english

Once at month, you have to discarghe the phone at 0%, put it in charge and switch on it when the led is green.
The battery life, during the day, depens of you and your use of phone

Just use it. Charge it when you need to, charge it when you can, top up charge is fine. Calibration is a myth. You don't need to do anything or not do anything abnormal.
Letting it run out and leaving it empty is a bad idea. Charging it, turning it off, charging it, and whatever other voodoo is recommended is a bad idea.

Lol at two contradicting responses.
Sent from my Desire HD using Tapatalk 2

asif9t9 said:
Lol at two contradicting responses.
Sent from my Desire HD using Tapatalk 2
Click to expand...
Click to collapse
Personally my thinks about battery is the same of users after my post.
But i wrote this because a lot of people say to do this...
Sent from ONE with Tapa4 Beta

Guich said:
Once at month, you have to discarghe the phone at 0%, put it in charge and switch on it when the led is green.
The battery life, during the day, depens of you and your use of phone
Click to expand...
Click to collapse
is their any special charging methods to be done after getting my new One ??

One charge for a day is enough for htc one if you don't play games

If you really want the most optimum battery life out of your phone then don't let it drain below 30% nor let it reach more than 90%. You'll likely get the most charge cycles and prolonged battery life with that. This suggestion sounds sarcastic but this is scientifically factual.

Riyal said:
If you really want the most optimum battery life out of your phone then don't let it drain below 30% nor let it reach more than 90%. You'll likely get the most charge cycles and prolonged battery life with that. This suggestion sounds sarcastic but this is scientifically factual.
Click to expand...
Click to collapse
How many HTC one batteries did you test? Using what methodology?
The only scientific fact is that you just made up those numbers, you have no idea what charge and discharge limits have already been placed on the raw cells by the battery circuitry.
---------- Post added at 03:25 AM ---------- Previous post was at 03:22 AM ----------
Guich said:
Personally my thinks about battery is the same of users after my post.
But i wrote this because a lot of people say to do this...
Click to expand...
Click to collapse
Quick lesson for life; feel free to engage your own brain. Stuff doesn't become true just because lots of people repeat it.

BenPope said:
Quick lesson for life; feel free to engage your own brain. Stuff doesn't become true just because lots of people repeat it.
Click to expand...
Click to collapse
I don't use this method.
But my friend have a very good battery life with it.
So, why don't share?
I don't use it because i can't do this, it's simple

HTC One Battery Conditioning
sarathsnair said:
is their any special charging methods to be done after getting my new One ??
Click to expand...
Click to collapse
G'day mate. When I had my HTC Desire, there was a process of conditioning that was advisable which pushed my battery life from 3/4 of a day to a full day. Having just received my HTC One last Friday (and what a magnificent phone it is too but that is a story for another day), I can honestly say that no conditioning is required (after-all, it does have a 2300mAH battery). I would suggest that you make sure that the first time you charge the phone, you leave it on charge for a minimum of 8hrs (as recommended by HTC). I left it on charge all day and I believe it does make a difference. As for making it last long, may I suggest you invest in an App called Juice Defender Ultimate (not very expensive but extremely useful) ? I am using this app and I have improved the battery life of my One from a single day to approx. 2.5 days. But I am an average user (emails, some internet, some music and blinkfeed). I don't watch movies on my phone so I am not too sure how that will affect battery life but I believe it will have some effect.
I hope this helps you with the answers you seek.

It's based on scientific facts.
When your battery has high load(Almost fully charged) more ions inside the battery are stored there hence doing alot of chemical changes in the battery. And chemical change is the only reason why our batteries here are losing it's capacity.
And the reason why I set 30% as the minimum is because you don't want your battery to be drained too much as there's likely chances that you'll completely drain it causing it to be broken also.
And why limit the examples on HTC One batteries? Is this a serious question or just a joke? We all know that HTC One was just released months ago and another obvious fact is it has a non removable battery. So obviously the answer would be none.
And about real life proofs about my usage and how it affects battery life do you want me to show you a nokia 3310 model still up and running for almost a 8 years now? Also want me to show you my nokia n900 which is already about 4 years now and still kicking it's battery perfectly up to now? I could have also showed you my n95 up and running till now if only it didn't break it's flex cable.
There's no such thing as integrated ticking time bomb on your battery(like rumors in the 20th century where they say electronic ICs have a hard coded date where they will totally shut off) where it would just instantly die once it reach it's recharge limit. What manufacturer in their right mind would do that? Smartphone business isn't a monopoly and every competitor would want the best of them all on their products. Also if this myth would have been true most people's device wouldn't even last a year due to plugging your phone on a computer would initiate a charge also. So would that mean that if I plug my phone on my PC 5x a day and charge it once a day it would only last roughly 6months? lol!
Also here's a good website that would backup my claim.
http://batteryuniversity.com/learn/article/do_and_dont_battery_table
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Partial and random charge is fine; does not need full charge; lower voltage limit preferred; keep battery cool.
Click to expand...
Click to collapse
Prevent full cycles, apply some charge after a full discharge to keep the protection circuit alive.
Click to expand...
Click to collapse
Keep cool, battery lasts longest when operating in mid state-of-charge of 20–80%. Prevent ultra-fast charging and high loads.
Click to expand...
Click to collapse
BenPope said:
How many HTC one batteries did you test? Using what methodology?
The only scientific fact is that you just made up those numbers, you have no idea what charge and discharge limits have already been placed on the raw cells by the battery circuitry.
---------- Post added at 03:25 AM ---------- Previous post was at 03:22 AM ----------
Quick lesson for life; feel free to engage your own brain. Stuff doesn't become true just because lots of people repeat it.
Click to expand...
Click to collapse

Did you read those websites? Because their numbers and yours don't agree. So either you made up the numbers or you obtained your scientific facts from elsewhere.

As much as I know....just dont overcharge and frequent charging. Overcharge meaning leaving your phone charged for long hours after it has reached 100%. Frequent charging meaning leaving your home with 100%, reach office at 85% and charge. Going for lunch with 92% and came back with 87% and you charge again. Get the picture? I'm no genius on batteries and dont bother looking up and reading on them. Just based on experience, over many phones. And yes, the first charge is very important.

I thinks the powersave is the best route when not playing any games. If you play games then you can call it quits!
Sent from my HTC One using Tapatalk 4 Beta

OzBoy08 said:
G'day mate. When I had my HTC Desire, there was a process of conditioning that was advisable which pushed my battery life from 3/4 of a day to a full day. Having just received my HTC One last Friday (and what a magnificent phone it is too but that is a story for another day), I can honestly say that no conditioning is required (after-all, it does have a 2300mAH battery). I would suggest that you make sure that the first time you charge the phone, you leave it on charge for a minimum of 8hrs (as recommended by HTC). I left it on charge all day and I believe it does make a difference. As for making it last long, may I suggest you invest in an App called Juice Defender Ultimate (not very expensive but extremely useful) ? I am using this app and I have improved the battery life of my One from a single day to approx. 2.5 days. But I am an average user (emails, some internet, some music and blinkfeed). I don't watch movies on my phone so I am not too sure how that will affect battery life but I believe it will have some effect.
I hope this helps you with the answers you seek.
Click to expand...
Click to collapse
milkw33d said:
As much as I know....just dont overcharge and frequent charging. Overcharge meaning leaving your phone charged for long hours after it has reached 100%. Frequent charging meaning leaving your home with 100%, reach office at 85% and charge. Going for lunch with 92% and came back with 87% and you charge again. Get the picture? I'm no genius on batteries and dont bother looking up and reading on them. Just based on experience, over many phones. And yes, the first charge is very important.
Click to expand...
Click to collapse
thank u so much

milkw33d said:
As much as I know....just dont overcharge and frequent charging. Overcharge meaning leaving your phone charged for long hours after it has reached 100%. Frequent charging meaning leaving your home with 100%, reach office at 85% and charge. Going for lunch with 92% and came back with 87% and you charge again. Get the picture? I'm no genius on batteries and dont bother looking up and reading on them. Just based on experience, over many phones. And yes, the first charge is very important.
Click to expand...
Click to collapse
Given that the phone comes with charge in it, how much can you do to affect the first charge?

BenPope said:
Given that the phone comes with charge in it, how much can you do to affect the first charge?
Click to expand...
Click to collapse
As much as I know, dont drain the battery too much the first time you take it out the box. All batteries comes with a little charge in it. Had a friend who used to work at a mobile company and I cant remember the term he used to describe that. But the first charge doesnt have to be exactly 8hrs. Phone might be fully charged after 4-6hrs if you hadnt used it much from the box. Just dont unplug it before it reaches 100% on the first charge. Let it get to full and leave it for another 10-15mins and its good to go.

Guich said:
Once at month, you have to discarghe the phone at 0%, put it in charge and switch on it when the led is green.
The battery life, during the day, depens of you and your use of phone
Click to expand...
Click to collapse
I let a cell phone battery get down to zero once. It never worked again.
I did the same with my house cleaning robot. I had to replace the battery after that.....I'm just saying.

anotherfakeusername said:
I let a cell phone battery get down to zero once. It never worked again.
I did the same with my house cleaning robot. I had to replace the battery after that.....I'm just saying.
Click to expand...
Click to collapse
Some devices have this problem.
Mine not.
Sent from One with Tapa4 Beta

Is the quick charge harmful?

Hi, I'm using my samsung phone with quick charger, however, I saw some people discuss that quick charge is harmful to the phone, is that true? anyone can confirm about this?

fincx said:
Hi, I'm using my samsung phone with quick charger, however, I saw some people discuss that quick charge is harmful to the phone, is that true? anyone can confirm about this?
Click to expand...
Click to collapse
I can't say that quick charge is harmful however what is usually not a great thing to do is to stick the phone on the charger all the time when there's plenty of power left. Like charging it from 80% to 100% is just wearing on the battery life faster and causing it to use an extra cycle.. Think of it like this say the phones battery can ONLY be charged a total of 100 times and that's IT no more it's dead after the 100 charge.. if you stick it on the charger at 95% and charge to 100% well now you just lost a cycle and you only have 99 charges left.. Wouldn't it have been better to use the entire battery power until it shuts off and then charge it?! Doing it this way actually extends the batteries life and keeps it working a lot better than constantly doing small charges.

fincx said:
Hi, I'm using my samsung phone with quick charger, however, I saw some people discuss that quick charge is harmful to the phone, is that true? anyone can confirm about this?
Click to expand...
Click to collapse
Ive always been taught that the faster u charge a battery the less charge it holds. And decreases the life span faster. That slower is always better on lifespan.
The added heat from quik charge also puts strain on device if being used at same time.
Just my opinion

Ive googled this and according to some psyhics, it doesnt matter how fast the electrons get to 3,000 mah. What really harms the battery is getting above 90% and below 10%. Everytime you get to 100% it counts as an cycle, and batterys have a limited life cycle. My orignal barttery went bad after 11 months...degraded from 3000 mah to 2,200. I manually replaced the battery myself

djhulk2 said:
Ive googled this and according to some psyhics, it doesnt matter how fast the electrons get to 3,000 mah. What really harms the battery is getting above 90% and below 10%. Everytime you get to 100% it counts as an cycle, and batterys have a limited life cycle. My orignal barttery went bad after 11 months...degraded from 3000 mah to 2,200. I manually replaced the battery myself
Click to expand...
Click to collapse
this is also true
i just personally dont think its good on them to quickly dump voltage to them either

Not sure it will harmful to the battery life span, but sometimes I charge my phone to 100% and continue, so this will also harmful to battery?

You can just not use your phone battery at all. Once lithuim ion batterys reach 100 thats it, they then drain from your electricty So by turning on your power case when uts at 100%, the phone drains from the case. Of course if your using like an 1amp charger, theb battery will drain if using while plugged in., because the screen is eating more energy than the 1 amp can provide

Batteries are cheap....replacing them isn't that difficult. I got 20 months from my original battery(always fast charged).
If I get the same from the replacement then it's all good.
Use the phone....that's why you bought it.
Sent from my SM-N920I using Tapatalk

Yes, forcing a lithium battery above it's operating voltage, something like 4.7v with a 5v to over come is ok. But 9v!?!? That's degraded it's performance. In the great scheme of things does it really matter? Probably not, chances are you will get a new phone in a year or so anyways and thats about when the battery fails.

Oops

I don't want to change the battery, and for now, more and more phone come with battery non-removable, it's not a good choose to change battery.

fincx said:
I don't want to change the battery, and for now, more and more phone come with battery non-removable, it's not a good choose to change battery.
Click to expand...
Click to collapse
Yes but how often? Every two years maybe?
Sent from my SM-N920I using Tapatalk

me_ashman said:
Yes but how often? Every two years maybe?
Sent from my SM-N920I using Tapatalk
Click to expand...
Click to collapse
I have never changed my battery since I owned my samsung s5 two years ago.
So how often will you change you battery? it is because the battery unavailable?

djhulk2 said:
Ive googled this and according to some psyhics, it doesnt matter how fast the electrons get to 3,000 mah. What really harms the battery is getting above 90% and below 10%. Everytime you get to 100% it counts as an cycle, and batterys have a limited life cycle. My orignal barttery went bad after 11 months...degraded from 3000 mah to 2,200. I manually replaced the battery myself
Click to expand...
Click to collapse
It's difficult? Could i ask you which battery to buy and where you bought it?

Its only hard if u want to keep your glass back. I tore up and shattered mine and dont care because my phone is always in a case, so youll never see the back. Got the oem battery from ebay for around 10 dollars. Then its just a matter of taking out all the screws, connecting the really small connector, and screwing back tightly. Like you need put pressure on screen when putting back together because for example volume down button might not work if press 2 lightly

It's easy, use a heat gun and the simple tools. Took me 20 mins and I didn't break anything. Just bought the battery off eBay
Sent from my SM-N920I using Tapatalk