Database Develop

Charging from PC - worth while?

Is charging our Kaisers from the PC ok? How much power does the USB provide to the Kaiser? Same as the standard adapter? I am asking this because I found no answer on the forum and I would prefer to load it directly from the PC every time rather than keep using the standard charger and putting it in the power outlet.

my advice for you to stop this option
because normaly we keep the phone connected to the pc for a long time and it makes the phone in charging mode all the time and iam sure that will make the battery dies fast
stop this option by disabling it from the battery options you can see it by clicking on the battery icon on the start bar
greetings

My phone has been plugged in to the USB at work all day, 5 days a week, for 5 months now. I can still get about 2 days out of the battery when I need to - for instance, after unplugging it each Friday at 5 I usually won't have to charge it until the same time on Sunday, the only time it generally does get plugged into the wall charger. I'm pretty sure my battery performance is still on a par with most people's - ie, not amazing, but quite livable with. It's certainly not showing any signs of harm from overcharging.

Boinng said:
My phone has been plugged in to the USB at work all day, 5 days a week, for 5 months now. I can still get about 2 days out of the battery when I need to - for instance, after unplugging it each Friday at 5 I usually won't have to charge it until the same time on Sunday, the only time it generally does get plugged into the wall charger. I'm pretty sure my battery performance is still on a par with most people's - ie, not amazing, but quite livable with. It's certainly not showing any signs of harm from overcharging.
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Same here.. no problems. I don't even know where my charger is.

I charge mine from the PC all day too, and it stops charging when its at 100%. The bottom line is this: a USB port delivers a minimum of 500ma at 5v, the wall charger is probably very close if not more than that. The charging circuit in the phone does all the work of converting the 5dc into a charging voltage/current required by the battery, usually ramping up and down. Theres no difference other than maximum current between a USB port and ANY 5vdc adapter.

Wall wart gives 5V/1A. USB at 5V/500mA will not harm your battery. If you're using the standard battery, USB charging is appropriate to keep it topped up.
RMD

Isn't the constant charging of the batter bad for it?
I mean you charge it use it for a while then hook it up again and so on, isnt it better for the battery if you wait until it says that you have to recharge it?

According to my BatteryStatus, my wall charger gives me around +500-600mA (depending on programs running) and USB 2.0 charging from the front port on my computer gives about +100-300mA (depending on what's plugged into the computer and program usage).

Insaneboy said:
Isn't the constant charging of the batter bad for it?
I mean you charge it use it for a while then hook it up again and so on, isnt it better for the battery if you wait until it says that you have to recharge it?
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That was a nicad battery issue lithium batteries do not have that issue.
-McMex

i think the point here is not if you charge it by usb or charger
for many people as they said it goes as well ok but it's an old advice used to be known that it's not good for your battery health to be on the charger all the time
also the same fact that it's always better to let the battery goes empty before you recharge it again some people have the sickness of recharging batteries when it's just gets 5 percent less , then they immaditaly start to recharge it again and this is a big mistake because in the long period the first levels of the battery start to die because they have never been used

mcmexican said:
That was a nicad battery issue lithium batteries do not have that issue.
-McMex
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Didn't know that.
Thanks.

haam1978 said:
the same fact that it's always better to let the battery goes empty before you recharge it again some people have the sickness of recharging batteries when it's just gets 5 percent less , then they immaditaly start to recharge it again and this is a big mistake because in the long period the first levels of the battery start to die because they have never been used
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Actually, its quite the opposite of what you say. If you let Lithium batteries discharge all the way, they will loose their capacity faster.
The following link will back up my claim:
http://batteryuniversity.com/parttwo-34.htm
Relevant quote: "Avoid frequent full discharges because this puts additional strain on the battery. Several partial discharges with frequent recharges are better for lithium-ion than one deep one. Recharging a partially charged lithium-ion does not cause harm because there is no memory. (In this respect, lithium-ion differs from nickel-based batteries.) Short battery life in a laptop is mainly cause by heat rather than charge / discharge patterns."

usb v wall charger
My kaiser
wall charger charges battery from flat (1%) in 1 hour
USB on PC takes 4 hours to go from 15 to 80%, only over night did it get to 100%.
I use wall charger everyday now.

axonn said:
Is charging our Kaisers from the PC ok? How much power does the USB provide to the Kaiser? Same as the standard adapter? I am asking this because I found no answer on the forum and I would prefer to load it directly from the PC every time rather than keep using the standard charger and putting it in the power outlet.
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i use the pc option especially when i am traveling and only have my portable. When using my portable, i plug my phone in to get a charge... i like this option as it saves me from having to lug around another adaptor as well as being able to charge my phone just off the batteries of my portable at any time,,,, good option

posted twice --- as usual being a post hog

It's fine. It just takes longer to charge, especially if you're transferring a lot of data.

With the lithium ion chemistry, it is very detrimental to the battery if you let it run down to empty all the time. The batteries do not like this at all and will exhaust much quicker this way. If you were to store the batteries, you should store them at 40% in a cool place as that would only lose 2% of life per year I believe. At 100% storage, you can lost 20% a year of life. A little reading at that battery university website goes a long way

johnny13oi said:
With the lithium ion chemistry, it is very detrimental to the battery if you let it run down to empty all the time. The batteries do not like this at all and will exhaust much quicker this way. If you were to store the batteries, you should store them at 40% in a cool place as that would only lose 2% of life per year I believe. At 100% storage, you can lost 20% a year of life. A little reading at that battery university website goes a long way
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So what happens when your battery that you leave stored at 100% loses 20% a year and a few years later it hits 40%?

Battery
haam1978: You are surely right for NiMh. But I don't know about Li-Ion. Time will tell. For now, I prefer to do it your way: discharge almost completely, BUT NOT TO 0%. Mostly to 5 - 10%. But the problem is that my stupid Windows doesn't report the life of the battery accurately ::- (. I got a Mugen 3000 Mah batt...
rotohammer & johnny13oi: Interesting website indeed. Unfortunately as I told haam, I can't get an accurate battery reading for this huge battery I got. Anyway, I'm still reviewing it ::- D.

rotohammer said:
Actually, its quite the opposite of what you say. If you let Lithium batteries discharge all the way, they will loose their capacity faster.
The following link will back up my claim:
http://batteryuniversity.com/parttwo-34.htm
Relevant quote: "Avoid frequent full discharges because this puts additional strain on the battery. Several partial discharges with frequent recharges are better for lithium-ion than one deep one. Recharging a partially charged lithium-ion does not cause harm because there is no memory. (In this respect, lithium-ion differs from nickel-based batteries.) Short battery life in a laptop is mainly cause by heat rather than charge / discharge patterns."
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100% correct.
On a side note, my kaiser will get fully charged way faster when connected to the wall as opposed to USB. (always connected to a desktop with a real big UPS).

battery lifetime extender tool

Hi there,
I was wondering if there exists any tool to prolong the liftime of the battery.
In energy settings you can specify that the battery isn't charged when the device connected by USB.
Wouldn't it be good to have a tool running in the background that checks battery status from time to time?
It should turn off charging until the charge level drops below a configurable percentage (e.g. 20%). Then the battery gets recharged again until full.
Should prolong battery lifetime.
Only Question is, when connected to usb and battery charging is turned off, is the device still powered by the USB port or is the battery used.
So, have you heared of such a tool?

Nice love the idea saves havin to leave phone on charge over night screwwing battery hopefully some 1 will know/be smart enugh to creat 1

But actually, Lithium polymer and LiOH batteries in fact do best with more frequent charges. Deep cycling a Lithium battery will kill it far faster then many partial discharge/charge cycles (deep cycle it once too far, and it'll be toast anyway - hence the smart circuitry that shuts it down before it fully discharges). Similarly, not using a Li battery is not great for it either - they do best with regular use. So my practice is to always charge whenever it's convenient, regardless of the battery's charge state, and to leave my Tilt on 24/7. I've found over the years that my various Li batteries (cell phone, laptops, etc) retain greater charge capacity for longer that way, then either not using regularly or not charging them frequently.
And a Li battery has a finite lifespan anyway - just sitting unused at optimal conditions on a shelf, and it will be toast in about 4-7 years (typically) from internal self-oxidation. That's why when buying replacements, you always want factory new, not warehouse stored

I've always been thinking that Li-ion batteries wear with every charge cycle. Yes, deep cycle is deadly to battery life.
With Li-ion I've made a different experience: My laptop at home is usually operated without its battery. It's five years old and the battery is still in good shape / about 66% of its original capacity.
My laptop at work is three years old, battery is always installed, has got its second battery one year ago, because the first one was worn out.
Of course, this is not a sample quantity to be statistically relevant but a single experience.
Anyway, if you use the ernergys panel option not to charge the battery on USB connect and have the device connected to usb, the battery gets discharged if you have the Kaiser turned on, so the idea wouldn't work.

dont torture that battery!
http://forum.xda-developers.com/showthread.php?t=351610&highlight=batt

I've always said this simple statement about LiIon: Charge early and often.
Do you need to plug the phone in every time you get off a call? No. Do you need to worry about it dropping below 80%? No. Just charge as often as is convenient. Sitting at a desk for a hour working on something? Charge. Driving for more than 15m? Charge.
I think if you obsess too much you might wind up with USB connector problems from all the cycles on the connector itself, but intelligent use of the above statement should get you the most out of your battery.
(Figure I'll do a small cross-post here as I replied to the wrong topic a minute ago)

i charge each night
doing so more often would not have too much of an effect if you ask me

Charging NC for longest battery lifetime

( meaning how many months before the battery loses storage capability, as opposed to "battery life" - how many hours until you run out of juice )
There are a lot of battery/charger threads, and some bright person actually looked up the TI charger circuit documentation, but I don't see anyone who has looked up what a li-ion battery needs to have a long lifetime.
So, I found information at:
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Interesting tidbits:
- Charging to 100% means that you can use the device longer the next day, but is not necessarily best for the battery itself. Frequent partial charges are just fine, and are actually better for the battery.
- It seems to be particularly important for Li-ion battery charging to be turned off when you get to 100%. The LED turning green in the NC cable shows that the system is taking care of this (so you can safely charge overnight without damaging the battery).
Connecting the NC to another system that does not stop applying current at 100% charged seems to definitely be a bad idea. So, don't use any system overnight, that the NC does not recognize as "charging".
This indicates that charging from a laptop USB may "work" but may be bad long-term for the battery. Here it depends on whether the TI charging circuit is sophisticated enough to adapt to the non-standard condition. Since the charging indicators do not indicate "charging" then the answer may be "no", and while you are getting the battery charged up, it may not be in the best way. (This seems to be an area for more research about the actual NC charging system.)
- The critical part is to not use a USB cable or other charging system that is not recognized by the NC, when the NC is close to 100% charge, to make sure that it doesn't overcharge the battery. As the article states:
Li-ion cannot absorb overcharge, and when fully charged the charge current must be cut off. A continuous trickle charge would cause plating of metallic lithium, and this could compromise safety. To minimize stress, keep the lithium-ion battery at the 4.20V/cell peak voltage as short a time as possible.
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- So, in summary, I think that a different brand of charger is okay as long as the NC recognizes it as "charging", and one should avoid charging in situations where you are "fooling" the NC by charging the battery when the NC is not noticing.

I honestly had no clue about this lol, thanks!
This might save a lot of headaches with "bad batteries" in the long run.

Thanks for this! Very interesting.

Well said, ADude. I'm so used to having to go onto forums and set people straight on the "myth's" of battery charging, but you hit it right on. The most important thing to remember is that overcharging drains your battery life (but most modern tech has auto off, in which it goes into a low power mode that allows for a stable current to just keep it around 99%), there is no benefit to letting your nook (or any other device) die completely before charging again, as there is not benefit to charging fully (or not charging fully) in the long run.
Thanks again!

LiIon likes being charged early and often... Don't run it down to 20-30% every time, it'll only shorten the overall battery. If it's down to 40-50% at the end of the night, put it on the charger.
Mine lasts 3 or so days before it gets near 40%.

Anyway of disabling usb charging on Galaxy S I9000?

Hi folks,
Been searching for a hack or tool to disable usb charging while connecting device to laptop usb port to prolong battery life. But to my disappointment, there's none at the moment
Aren't there any solution for this at all from the developers?
So far, the only tool that I've googled is USB Charge Commander but that doesn't work on Galaxy S
It's designed for ZTE Blade/Orange San Francisco handset only.
Appreciate for any tips given. Thanks!

Sassy,
there is no need for such a tool. Since you are using a Lithium-ion battery this would NOT prolong your battery life. This type of battery has no such thing as a memory effect. The battery will take no damage if you charge it every time. You don´t have to wait till it is fully empty. Actually, if you discharge your battery completely every time, it may cause shorter battery life in the end...
Have Fun
Chris

How about this for a reason:
I don't want the phone to charge off of my laptop which itself is running off of a battery, but I do need a USB connection for application debugging. My laptop's battery does not last nearly as long as my phone, so I would prefer that the phone does not charge via USB when my laptop is running on batteries.
No solution?

USB charging shortens battery life
Indeed, I've been looking for such a solution of USB connection without charging for my Galaxy S. I also came across a suggestion of clipping the power +5V wire of the USB cable which I believe would not work as that would disable the detection of USB connection.
Back to the battery life of lithium battery, we know that partial discharge is fine as there is no memory effect. However, every discharging cycle matters and counts if we believe the info from the Battery University page, Table 2 (batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries). According to the test and assumptions, if we charge the battery at 10% of Depth of Discharging (or approx. 90% of capacity), we have 4700 cycles before the battery is worn out. Yeah, 4700 seems a big number. It is not that big if we connect our phone via USB to a PC very often.
We don't know the exact no. of discharge/charge cycles a li-ion battery on our mobile phone can tolerates before its end of life. If you believe EVERY CYCLE COUNTS, you'd better find a solution.
Franky

You can try using File Expert https://market.android.com/details?id=xcxin.filexpert&feature=related_apps for accessing the files via WIFI or connect your phone via Bluetooth.

rustamabd said:
My laptop's battery does not last nearly as long as my phone, so I would prefer that the phone does not charge via USB when my laptop is running on batteries.
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Typical laptop batteries are around the 4.4Ah mark, the phone draws 95mA from the USB port while charging. This means you could charge your phone continuously for 46 hours off a typical laptop. You won't notice the difference in practical usage at all. This is about the same amount of power as your laptop CPU doing actual work for a few minutes. There are many other factors that have a far greater impact on your laptop battery than charging a phone.
pistachia said:
We have 4700 cycles before the battery is worn out. Yeah, 4700 seems a big number. It is not that big if we connect our phone via USB to a PC very often.
...
If you believe EVERY CYCLE COUNTS, you'd better find a solution.
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If you look at the table in detail you'll find that 4700 cycles at 10% recharge is roughly 10 times the 500 cycles at 100% recharge. It's an almost linear relationship and there's nothing to be gained by letting your phone discharge further rather than putting it back on charge when it drops to 10%. The cycles aren't a counter after which suddenly everything stops.
Also they are hammering their battery pretty hard. A 1C charge is roughly 4 times higher than what the SGS battery experiences. The faster the charge the lower the life, so expect your phone to last longer than 4700 cycles.
On top of everything with replacement batteries costing a whole $5 it's not worth losing sleep over.

Yeah, you're right. If a replacement battery costs that little, even my quoted analysis really matters, it does not worth 'counting' at all! Just use the way you want and make sure you got one replacement before it's out of market.

garbz said:
...the phone draws 95mA from the USB port...
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Are you sure about this? Where does this info come from? The info I have is 500mA for a USB 2.0 port...

The option is available in MIUI

[Q] the phone is very hot when charging

I 've lost my original charge.so I have to use an Ipod charger to instead it.
But the phone seems very hot every time charging. What shoud I do now?
In additional, the battery drained so much. It took 4 minutes to lose 1% battery.I 'be bought the phone for 6 months,so why does it drain battery so bad?
Please help me and forgive for my bad in English.

2 options:
1) Your battery is fried.
2) Something is running on your phone that causes it to drain battery (forgot GPS app running in the background or something?), which is also the reason for heating up.

How can I know that my battery was fried? Example like how many mAh are there in my Batt?
I was looking for BatteryDetective (like in my friend 's iPhone 3GS) but it is no avalible for my device.
Also,how to check what was running in background? GPS is alway turns off when charging,certainly
I turned off the phone and charged.and it was still hot,but not much as when the phone turn on

In general, using a different charger won't damage your phone. Apple chargers are often capable of supplying more current than other chargers (for example, 2100mA rather than 1000mA), but the phone will only draw as much current as it needs. As long as the charger is supplying proper, in-spec voltage, you shouldn't see any difference. Your phone is probably getting hotter because it can draw more power from the iPod charger than your old charger, and can now charge the battery faster. I wouldn't worry about it unless the heat is causing problems. Cheap, off-brand chargers sometimes don't supply proper 5V, so don't buy crappy chargers.
Your battery discharge rate is a separate problem. You can check what's been using battery power in Settings|About Phone|Battery use. In my world, Display, Wi-Fi, Cell Standby, and Phone Idle are usually the top items. Checking the wear level of a regulated LiOn battery is kind of annoying; they're cheap enough I just replace them every year or so (500 cycles is a pretty good lifetime).

Thank you very much !
Are there any app like BatteryDetective for android? I 'd like to know how many mAh of my battery