Develop Bugs

Best advice for sharging battery for first use out of box?

so what is the best thing to do?
is there any way of charging,dis charging ect to get the best battery life?
or should i just charg it to 100% and use it right away?
i did a charging squence with my nexus s. but duno about the Gn.

for me is to turn on the device and start working until the battery drops to 0-1%.
only then im charging it X2 then needed to go to 100%, you can make it Double if you want.

Well, this is going to be one of those threads where everyone has their own little way to care for a battery and others say their way is better, etc, etc the arguments breaking out which will result in people posting www.batteryuniversity.com in an effort to win said arguments.
Here's mine. On a brand new phone, I put the battery in, boot up, connect the charger, run it to 100%, disconnect charge, run battery all the way down, connect the charge, run to 100% and go about my life charging when I need to.
My two cents. Have no idea if it does any good, but my SGSII is going on 1 day 14 hrs on a single charge, so it must work somehow...

ericshmerick said:
Well, this is going to be one of those threads where everyone has their own little way to care for a battery and others say their way is better, etc, etc the arguments breaking out which will result in people posting www.batteryuniversity.com in an effort to win said arguments.
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Click to collapse
100% Agree. There will be a lot of different opinions.
ericshmerick said:
Here's mine. On a brand new phone, I put the battery in, boot up, connect the charger, run it to 100%, disconnect charge, run battery all the way down, connect the charge, run to 100% and go about my life charging when I need to.
My two cents. Have no idea if it does any good, but my SGSII is going on 1 day 14 hrs on a single charge, so it must work somehow...
Click to expand...
Click to collapse
My way,
Turn on phone, charge it to 100%, leave it plugged for an extra 20 min, and start using it normally.
The only time I discharge a battery is after a couple of months. Because we never charge it to 100% and they start creating memory and charging less and less every time. The purpose of discharging it completely is to erase its memory. That's why when it is new, I see no point on discharging it completely. Batteries suffer every time they are completely discharged and if they are left 100% for a long period of time, thats why new batteries always come charged about 50%, to extend battery life since they may be stored for a long period of time. (ref. aviation school)
Just my 2 cents.

sstang2006 said:
The only time I discharge a battery is after a couple of months. Because we never charge it to 100% and they start creating memory and charging less and less every time. The purpose of discharging it completely is to erase its memory. That's why when it is new, I see no point on discharging it completely. (ref. aviation school)
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That hasn't been true since NiCd's in the 1980s.
Modern Lithium-Ion and Lithium-Polymer batteries have no "memory" and are actively damaged if allowed to discharge fully.

HooloovooUK said:
That hasn't been true since NiCd's in the 1980s.
Modern Lithium-Ion and Lithium-Polymer batteries have no "memory" and are actively damaged if allowed to discharge fully.
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Click to collapse
OK, I may be wrong I'm no expert.
Why do people keep discharging them to 0% if they have no memory? (I'm not been sarcastic)

sstang2006 said:
Why do people keep discharging them to 0% if they have no memory? (I'm not been sarcastic)
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Generally because they don't know any better and they don't realise battery technology has moved on.

Because batteries "back in the days" were quite sensitive to memory. That's why we were all raised by the complete-discharge-mantra, which sticks with you forever. The next generation won't have this problem and will feel free to charge their phones when they want to. ;-)

sstang2006 said:
OK, I may be wrong I'm no expert.
Why do people keep discharging them to 0% if they have no memory? (I'm not been sarcastic)
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Becouse android in itself keeps a battery log, it is from this log your device calculates the amount of battery you have left. To keep these values true (calibrated) you should do 2-3 cycles where you on purchase, discharge fully until device auto shut down, start it WITHOUT charge a couple of times and let it die to set the min value, charge up to 100%, use your device again till auto shut down... you dont have to worry about damaging your battery in this case since your device it programmed to shut down with good marginal of battery depletion. What you SHOULD NOT do is leave an empty battery uncharged for a long period of time.
Sent from my X10i using xda premium

Lithium batteries will be damaged if they are stored fully charged or fully discharged for extended periods of time. Thats why the battery is about half charged when its new. They have no memory effect, they just loose capacity.
Sent from my Nexus S using Tapatalk

Tjotte said:
Becouse android in itself keeps a battery log, it is from this log your device calculates the amount of battery you have left. To keep these values true (calibrated) you should do 2-3 cycles where you on purchase, discharge fully until device auto shut down, start it WITHOUT charge a couple of times and let it die to set the min value, charge up to 100%, use your device again till auto shut down... you dont have to worry about damaging your battery in this case since your device it programmed to shut down with good marginal of battery depletion. What you SHOULD NOT do is leave an empty battery uncharged for a long period of time.
Click to expand...
Click to collapse
Good point. While it's important not to fully discharge the battery too often, there is also the issue of calibrating the battery meter.

ericshmerick said:
Well, this is going to be one of those threads where everyone has their own little way to care for a battery and others say their way is better, etc, etc the arguments breaking out which will result in people posting www.batteryuniversity.com in an effort to win said arguments.
Here's mine. On a brand new phone, I put the battery in, boot up, connect the charger, run it to 100%, disconnect charge, run battery all the way down, connect the charge, run to 100% and go about my life charging when I need to.
My two cents. Have no idea if it does any good, but my SGSII is going on 1 day 14 hrs on a single charge, so it must work somehow...
Click to expand...
Click to collapse
That's exactly what I do, had 14 hours of moderate use today and still had 45% left. More than happy with that. It seems to be getting better each day at the moment.

Crin said:
That's exactly what I do, had 14 hours of moderate use today and still had 45% left. More than happy with that. It seems to be getting better each day at the moment.
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Click to collapse
78% after 14 hours here, but that's light use.

sstang2006 said:
OK, I may be wrong I'm no expert.
Why do people keep discharging them to 0% if they have no memory? (I'm not been sarcastic)
Click to expand...
Click to collapse
The whole "discharging the battery fully" thing doesn't really apply here - because nobody will ever fully discharge it. The Nexus uses a Lithium Ion cell - it's a single cell, with a nominal voltage of 3.6V. When fully charged, it peaks at 4.2V (at which point, the charging circuitry cuts off to avoid overcharging). However, when we "fully discharge" our phones, the cell only goes as low as 3.5V - and then the phone shuts off.
In reality, lithium cells can discharge to around 3.0V before any damage occurs. However, this would yield very little extra battery life. Stopping at 3.5V provides a wide safety margin (lithium cells are potentially dangerous if overcharged/discharged), whilst extending cell life.
In a nutshell - don't worry about running your phone down to 0% (unless you're putting it in storage, in which case leave it at about 60%). In fact, it's a good thing with a new phone, as cycling (charging and discharging a cell) helps to "wake" the cell up and reach it's max capacity more quickly.
Sent from my Galaxy Nexus using XDA App

i see some good ideas about charging and discharging.
but it is indeed a fact that 100% and 0%(real) isnt good for our new race of battery's.
but a few posts here already tell how and what.
and its not gonna be a thread of arguments and stuff,if we all keep it in our heads that we just want to share our tip's of how you think its the best way(and have some experience with it)
just to share some info. and not compete the info against each other.
i well know there are different ways. but its always nice to read what experience people have with it to make a choice for my own and any other wanting to know this.
and i posted here in the GN section,instead of the Android section because each phone handles battery different,and this narrows the options down to a single device :3

Just keep in mind it's not just about the battery itself it's about the software registering how much actual power the battery has at a certain time, so if the battery has in actuality 100% charge in it, and the software reads 80 then your phone will die out sooner. So charging and discharging is good because it calibrates the hardware with the software. Just remember to switch off the device then charge it so the software doesn't auto discharge when it thinks the battery reached 100%.

K i just skipped thru the posts, gonna throw in my input real quick.
Basically just run down the battery. Once it turns off, hold the power button to make sure all the juice is gone. Then charge it up to 100% and leave it there for a good hour. Now (root required) download https://market.android.com/details?...yLDEsImNvbS5uZW1hLmJhdHRlcnljYWxpYnJhdGlvbiJd and follow the instructions .. its not exactly necessary but a nice thing "just in case" .
thats my plan anyways.

Nutsonfire said:
Lithium batteries will be damaged if they are stored fully charged or fully discharged for extended periods of time. Thats why the battery is about half charged when its new. They have no memory effect, they just loose capacity.
Sent from my Nexus S using Tapatalk
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Where does the loosed capacity go? Can it be caught?

And what do you think about charging with the phone being switched on? Is it better to have it switched off?
Sent from my Galaxy Nexus using xda premium

juniorbattle said:
And what do you think about charging with the phone being switched on? Is it better to have it switched off?
Sent from my Galaxy Nexus using xda premium
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Won't make a difference.. Phones are designed to be left on anyway.

[Q] Phone uses 2% battery every 15 minutes

My phone seems to be using 2% battery every 15 minutes on standby, worse when its on.
When I check what is running, it says Android OS 50%...... what can I do? I usually charge my phone three times a day.
Sent from my Galaxy Nexus using xda premium

I use a variety of apps to check what is going on with my phone.
Watchdog - monitors apps for excessive cpu usage
Cpu spy - see how long your phone stays at each frequency, but more importantly in deep sleep.
Battery monitor widget - monitors battery usage
System tuner pro - get detailed analysis of a recorded system usage.
Also, when in battery usage, I click android os to see how long it has kept your phone awake. Have you made any changes to your phone? Installed a custom ROM?
Sent from my Galaxy Nexus using xda premium

Also...give it a few days of charge-ups. It really does make a difference.
FWIW, with moderate use, my Droid Charge 4G does about 10-15% every hour. So I don't even think 8%/hr is that bad... :/

no changes to the phone, its all stock. Any benefits moving to a custom ROM on the nexus?
I've had the phone for two weeks, battery has deteriorated. Now charge it three times a day.
Sent from my Galaxy Nexus using xda premium

Crazy CS said:
no changes to the phone, its all stock. Any benefits moving to a custom ROM on the nexus?
I've had the phone for two weeks, battery has deteriorated. Now charge it three times a day.
Sent from my Galaxy Nexus using xda premium
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You probably never calibrated it properly to begin with. Charge to 100% > unplug > wipe batterystats.bin > let the battery drain completely until the phone powers off. Then charge it continuously over night and in the morning unplug and let the phone drain completely until it powers off.
I am a pretty heavy user as I text literally every 2 minutes all day (girlfriend ) and I manage to get 20-25 hours easily.
I also drain my battery out completely every day for good measure
Charging in between screws up your calibration, try not to charge unless you are below 15%. And do not disconnect it until it is fully charged (98-100%).
Note: I've also noticed wifi saves you a lot more battery juice than being on 3G/4G, so keep your wifi active if you are in range

KiNG OMaR said:
I also drain my battery out completely every day for good measure
Charging in between screws up your calibration, try not to charge unless you are below 15%. And do not disconnect it until it is fully charged (98-100%).
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This is just not accurate for Lithium Ion batteries, which have no cell memory and gain more from frequent shallow charges than deep charges.

krohnjw said:
This is just not accurate for Lithium Ion batteries, which have no cell memory and gain more from frequent shallow charges than deep charges.
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Click to collapse
Not to mention draining a Li-ion past 5% can shorten the life of the battery.
Further Li-ion's have a lifespan measured in cycles. You get about 500 cycles on a typical Li-ion. A cycle is a drain and charge. If you use 50% of the charge and then recharge to 100% you only use half a cycle. By needlessly draining the battery you are using up limited cycles reducing the life span of the battery.
While I'm sure android's calibration needs to know the upper and lower boundaries of a charge I'm certain it would be smart enough to handle charges when the battery isn't completely drained. Most battery calibrations work this way. Every once in a while you need to charge to 100% drain to 5% and recharge without using to 100%

Wheres battery stats.bin located?
Sent from my Galaxy Nexus using xda premium

Crazy CS said:
Wheres battery stats.bin located?
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Clockwork Recovery -> Advanced.
.. file is in /data/system i believe

its probably a bad app working with ICS.
Use watchdog and it will tell you.
Check your widgets that they aren't constantly refreshing.

[Q] battery life and charging habits

I've had my S3 for a few months now and I've noticed that I get different battery life depending on my charging habits with nearly identical use.
If I charge it overnight (thus, it remains on charge fully charged for a few hours) I get about 8 hours of general use.
If I charge it during the day and monitor it and take if off charge soon after it is fully charged (thus, it does not remain on charge fully charged) I can get about 1 to 2 days of general use.
That's a HUGE difference just from charging habits. Anyone else observe the same thing?

zshguru said:
I've had my S3 for a few months now and I've noticed that I get different battery life depending on my charging habits with nearly identical use.
If I charge it overnight (thus, it remains on charge fully charged for a few hours) I get about 8 hours of general use.
If I charge it during the day and monitor it and take if off charge soon after it is fully charged (thus, it does not remain on charge fully charged) I can get about 1 to 2 days of general use.
That's a HUGE difference just from charging habits. Anyone else observe the same thing?
Click to expand...
Click to collapse
It seems to be the exact same with me. I always charge my phone over night and it will drop must faster than if I partially charge it or take it off when its done. I would like to know if anyone has a way to fix this.

Same here. It really annoys me, because I don't really want to wake up in the middle of the night to unplug my phone.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

I think that's a lithium ion battery thing in general, and not just an S3 thing. I don't know the exact guidelines for charging a lithium ion battery because there is a lot of conflicting information passed on through word of mouth, but I think - as I prepare to pass on my own word off mouth theory- I think you're supposed to charge your battery before it gets less than like 10 percent discharged, and you're not supposed to let it overcharge. There's something about how lithium ion batteries have a memory to them and if you charge them improperly, you risk slowly killing your battery over time.
I realize now that you may already know all that but are just asking why overcharging your battery specifically leads to less battery life that day, but I don't know that and I already typed all that carp out, so it's staying
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

zshguru said:
I've had my S3 for a few months now and I've noticed that I get different battery life depending on my charging habits with nearly identical use.
If I charge it overnight (thus, it remains on charge fully charged for a few hours) I get about 8 hours of general use.
If I charge it during the day and monitor it and take if off charge soon after it is fully charged (thus, it does not remain on charge fully charged) I can get about 1 to 2 days of general use.
That's a HUGE difference just from charging habits. Anyone else observe the same thing?
Click to expand...
Click to collapse
Phone charges to 100% then doesn't charge. Even if it says 100 while plugged in it could be down to 90. I have no idea why this is cutting a day off your usage time, but that is why it is shorter than if you unplug it. Could be that you use it more during the day and you are getting longer usage times since it is charging while using and unplugged at night while it is barely using 1 or 2 percent of the battery for 8 hours.

I put mine on charge at night before I go to bed, and then disconnect when I wake up the next day. It comes the whole day until same time in the night to put to charge. I normally get like 3+ hours display (on auto brightness, and full sync) with about 30% battery left.
Once battery is charged to 100, even if its connected to charger, there would be only trickle charge, and not regular charge to the battery. But it shouldn't make a significant amount of difference between taking off immediately or later in the morning.

I just leave it on charge overnight. There are sensors in it to prevent overcharge. What hurts lithium batteries is letting the battery drain to 0%.
Sent from my SAMSUNG-SGH-I747 using xda premium

Are we not supposed to charge our phone overnight?

My battery wasn't holding a charge so I went to a T-Mobile store to get it replaced and they asked me if I leave it to charge overnight I go yeah so it has charge for the day and they told me not to because it destroys the charge. So xda community aka the experts let me know if this is true and if it is, how am I supposed to charge my phone?
Sent from my SGH-T999 using Tapatalk 2

I've charged this phone almost every night since I got it (early June) and my battery is still doing outstanding. There are times when charging it over night the battery will set it self to draw battery so it can recharge and not cause harm I believe. There are many superstitious theories and others that "battery experts" say charging over night can be harmful. Overall I don't buy into too much. I always try to unplug as soon as it hits 100% though.
T-Mobile SGS III

I don't think its true either.. I've charged all my phones like that since I can remember and never had problems with battery, other than software related problems that drained battery, but fixable.. Did you check if maybe it was software related and not due to the battery?
Sent from my SGH-T999 using xda premium

That's so stupid. With how limited these batteries are not being able to start the day at 100% is unacceptable.

I always leave it to charge overnight.

Just now I unplugged by mobile after overnight charging
Sent from my A90S using xda app-developers app

Its bs they are like bots so they are programmed to say these things. Basically to appear as they know the "answer" to your problem. So got work in the morning I'm not suppose to charge my phone overnight and leave with 5% battery in the morning, they know they charge their phone every night. When a rep ask me that same question once I said "No I leave to work with my Samsung flip phone because I can't charge my 500 phone overnight".. *sarcasm*.
Sent from my SGH-T999 using xda app-developers app

All nighter here too. No issues whatsoever. Mine Gets warm when charging the cools back down after fully charged.
Sent from my Galaxy S3 using neighbors wifi

This use to be true on older phones. The galaxy S 3 and most new phones stop charging once they hit 100% it will only start charging again when it drops under 100.
And even before on older phones where it wasn't recommended I did it anyway. No harm done.

I've done this with all my phones, nothing ever happened to them
Sent from Flip's S3

Overcharging protection, while present, can fail.
If you guys want to have a full charge in the morning, try an outlet timer - or put it in airplane mode overnight (I do that, battery is down only 1-3% after ~8 hours). You could also turn off data + wifi - so phone calls are still there if you are really worried about getting an emergency call in the middle of the night, the call function is still there, but apps aren't syncing and wasting battery and sleep time doing so.
I'm just not comfortable with the fire risk of leaving it in overnight. Sure, it probably won't fail - but if it does ? Why take that chance when there are other solutions ? I just charge it at my desk before going to bed, unplug it when it reports full charge.
It's the same kind of risk as putting a 100W bulb in a 60W socket - sure, you might be fine for a while, you might never have problems - but you might also start a fire when components fail under the stress.

Pennycake said:
Overcharging protection, while present, can fail.
If you guys want to have a full charge in the morning, try an outlet timer - or put it in airplane mode overnight (I do that, battery is down only 1-3% after ~8 hours). You could also turn off data + wifi - so phone calls are still there if you are really worried about getting an emergency call in the middle of the night, the call function is still there, but apps aren't syncing and wasting battery and sleep time doing so.
I'm just not comfortable with the fire risk of leaving it in overnight. Sure, it probably won't fail - but if it does ? Why take that chance when there are other solutions ? I just charge it at my desk before going to bed, unplug it when it reports full charge.
It's the same kind of risk as putting a 100W bulb in a 60W socket - sure, you might be fine for a while, you might never have problems - but you might also start a fire when components fail under the stress.
Click to expand...
Click to collapse
Is there some sort of smart outlet that can stop charging when it reached 100%? I guess in a way the same as the outlets that has a master outlet and able to turn off the rest when the master outlet is off?

I charge mine overnight
I usually let me charge overnight, it hasn't caused any problems for 6 months now.

It is true that your battery being at 100% charge (even if charging to the battery has stopped) is harder on your battery and overall capacity will lower at a faster rate than one stored at 60%. The thing is the difference is negligible over a year. It is technically best for your phone to be charged to 100% and then removed from charge so the battery can drain but we are talking about the difference of wether the half life of your battery is 3 or 4 years. overnight charging is not why your battery has failed.

Chuckatron said:
It is true that your battery being at 100% charge (even if charging to the battery has stopped) is harder on your battery and overall capacity will lower at a faster rate than one stored at 60%. The thing is the difference is negligible over a year. It is technically best for your phone to be charged to 100% and then removed from charge so the battery can drain but we are talking about the difference of wether the half life of your battery is 3 or 4 years. overnight charging is not why your battery has failed.
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Agreed it was probably a defective one he got. Even though the s3 is really awesome I'm not sure all if us will still have this phone 3 or 4 years from now. So go ahead and charge it don't worry.
Sent from my SGH-T999 using xda app-developers app

Charging Overnight

Am I the only person who is some what leary of charging my phone overnight. What I mean is, will it harm the phone any by sitting there fully charged for a few hours or more?
And that raises another question or concern. Does it hurt the device by plugging in and charging a little bit throughout the day or should I let the battery drain as much as possible then plug in?
Thanks for any replies
Sent from my SPH-L900 using xda premium

Only with my laptop and dewalt 18volt lol. Because it is a nicad battery.
Sent from my SPH-L900 using xda app-developers app

tld88 said:
Am I the only person who is some what leary of charging my phone overnight. What I mean is, will it harm the phone any by sitting there fully charged for a few hours or more?
And that raises another question or concern. Does it hurt the device by plugging in and charging a little bit throughout the day or should I let the battery drain as much as possible then plug in?
Thanks for any replies
Sent from my SPH-L900 using xda premium
Click to expand...
Click to collapse
I don't think it will hurt the battery to leave on charge for an hr or two at 100%. It is recommended to not charge till you are 10% or under from what I read
Sent from my Nexus 7 using xda app-developers app

These phones are lithium batteries. Once it hits 100% or too hot to charge the circuit shuts down. Even my stupid cordless drill does this.
Sent from my little Note2

Thanks guys. Much appreciated.
Sent from my SPH-L900 using xda premium

I actually use a lower amp charger for charging over night and I notice my battery lasts much longer than compared to the 2 amp charger it came with.
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mcskibadee1 said:
I actually use a lower amp charger for charging over night and I notice my battery lasts much longer than compared to the 2 amp charger it came with.
Sent from my SPH-L900 using xda app-developers app
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Click to collapse
I do the same
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mcskibadee1 said:
I actually use a lower amp charger for charging over night and I notice my battery lasts much longer than compared to the 2 amp charger it came with.
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Click to collapse
I am going to give this a try itbis a good idea thanks never thought of using a low amp
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tld88 said:
Am I the only person who is some what leary of charging my phone overnight. What I mean is, will it harm the phone any by sitting there fully charged for a few hours or more?
And that raises another question or concern. Does it hurt the device by plugging in and charging a little bit throughout the day or should I let the battery drain as much as possible then plug in?
Thanks for any replies
Sent from my SPH-L900 using xda premium
Click to expand...
Click to collapse
Lithium Ion batteries are in an ideal state of equilibrium when at 50% charge. If you want to maximize the overall shelf life of the battery, do your best to keep it around 50% charge and avoid the extremes like 0% and 100%. Practically speaking this is tough to do. I am frequently near a charger, so I can unplug around 60% and plug it back in around 40%. The high amperage chargers that come with the phone can add 20% in about 30-40 minutes.
So the answer to your question is, the less time your battery spends at 100% the better to maintain the quality of the battery.

LOL, I keep phone on the charger all the time. Then again, I usually have the screen on most of time.
The only danger I can think of is if someone comes out with a kernal that does SBC which can give batteries more charge, but can also damage the battery if overcharged. I haven't kept up on all the kernals, but I don't believe anyone has made any with SBC.

justppc said:
Lithium Ion batteries are in an ideal state of equilibrium when at 50% charge. If you want to maximize the overall shelf life of the battery, do your best to keep it around 50% charge and avoid the extremes like 0% and 100%. Practically speaking this is tough to do. I am frequently near a charger, so I can unplug around 60% and plug it back in around 40%. The high amperage chargers that come with the phone can add 20% in about 30-40 minutes.
So the answer to your question is, the less time your battery spends at 100% the better to maintain the quality of the battery.
Click to expand...
Click to collapse
50% is for storage. When in use it is optimal to charge to 100% and recharge between 10-20%, ideally at the 15% warning, which is why it's there. Charging to 100% overnight wouldn't have a huge impact on battery life for a li-ion unless you left it plugged in for several days straight. All newer good quality cellphone and mobile device li-ions have a voltage regulator and charging circuit built in. When the battery reaches 90% the voltage regulator drops the input voltage so its receiving less power til 100% once it reaches 100% the charging circuit opens and stops charging the battery, once the battery begins to discharge again while plugged in the voltage regulator switches to "trickle" charge mode which puts back a small amount of power every minute or so. When "trickle" charging the input power is so low the battery can actually drain while still charging if its being used. These are safety measures to prevent damage to the phone and battery and lessen the risk of the battery exploding, but it also helps prolong the life of the battery by preventing it from constantly overcharging if you forget to unplug it or charge over night. Hope that helps explain a bit about how charging works. Its also better to charge the battery at lower amperage outside of the device. Optimal charging for a li-ion is around 750ma on an external charger or while the device is off.
I like to break stuff!

-EViL-KoNCEPTz- said:
50% is for storage. When in use it is optimal to charge to 100% and recharge between 10-20%, ideally at the 15% warning, which is why it's there. Charging to 100% overnight wouldn't have a huge impact on battery life for a li-ion unless you left it plugged in for several days straight. All newer good quality cellphone and mobile device li-ions have a voltage regulator and charging circuit built in. When the battery reaches 90% the voltage regulator drops the input voltage so its receiving less power til 100% once it reaches 100% the charging circuit opens and stops charging the battery, once the battery begins to discharge again while plugged in the voltage regulator switches to "trickle" charge mode which puts back a small amount of power every minute or so. When "trickle" charging the input power is so low the battery can actually drain while still charging if its being used. These are safety measures to prevent damage to the phone and battery and lessen the risk of the battery exploding, but it also helps prolong the life of the battery by preventing it from constantly overcharging if you forget to unplug it or charge over night. Hope that helps explain a bit about how charging works. Its also better to charge the battery at lower amperage outside of the device. Optimal charging for a li-ion is around 750ma on an external charger or while the device is off.
I like to break stuff!
Click to expand...
Click to collapse
This. These batteries should be above 70 precent or so as much as possible to remain efficient. Also never let it die that decreases life span.
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