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very bad battery drain issue :(

my o2 xda is running tnt wm6 for a long time now with no problems but recently my battery has started draining super fast like right infront of my eyes it drops percent numbers. i run battery status but that has never bugged the battery before. i also tried switching batteries with two of my friends and their phones run fine but mine drains fast. i have charged it with both the computer and the charger. it charges super slow and upon charging when i restart it the battery drops something like 20 percent or more instantly. could this be a virus? i factory resetted my phone and formatted my memory card but im still getting this issue. please any help would be much appreciated!

d3aded said:
my o2 xda is running tnt wm6 for a long time now with no problems but recently my battery has started draining super fast like right infront of my eyes it drops percent numbers. i run battery status but that has never bugged the battery before. i also tried switching batteries with two of my friends and their phones run fine but mine drains fast. i have charged it with both the computer and the charger. it charges super slow and upon charging when i restart it the battery drops something like 20 percent or more instantly. could this be a virus? i factory resetted my phone and formatted my memory card but im still getting this issue. please any help would be much appreciated!
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try other ROMs.

the fact of the matter is that ive been using this rom for so long without problems and this battery charger thingy just started a few days ago. could this be hardware problem?

Time for a new battery. Try nothing else until you have replaced it, with a new one, not one from another phone.

new battery really? u mean a battery from another phone doesnt do? and yes my battery dies very fast even my friends battery in my phone. cudnt this be a problem in my phone then? cause its his battery

Its definately a battery issue.
Check out this thread and I think you will relate: http://forum.xda-developers.com/showthread.php?t=353780
Then go to eBay and buy an new OEM replacement for like $10 shipped. I think I paid $8 for mine.

I personally think it is a bug.
On three separate occasions using various roms, my battery would drain from 100% to 0% in an hour. I would reset everything, recharge and it would run normal without problems.
I do not know what causes this but it does appear to be a software glitch, at least in my case.

try to hard reset your device and then test (after backup your data).
this can give you the clear reason (in case of the rom was running well with you).
good luck

try another radio!

i had the same issue, but it stop draining after i ordered the new battery

I suspect that it is not the battery or the unit.
its right said:
try to hard reset your device and then test (after backup your data).
this can give you the clear reason (in case of the rom was running well with you).
good luck
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Actually I am suddenly having the same problem with a brand new battery on a brand new Wizard.
I just loaded the newest Mfrazz Rom which seems to be fantastic in its applications, speed etc. however immediately on loading the ROM, my battery does get hot in normal use and drains to 30% in a normal day. I have even loaded the IRDA disable cab to no particular effect.
Is there some specific procedure to which you are referring for hard resetting the Wizard? I assume you don't just take out the battery?

Dead battery
Lithium batteries can be killed rather easily. I know from rc helis. Most mobile phones use lithium-ion batteries. Helis use lithum-polymer batteries but they have pretty much the same charactoristics. li-poly is a little more volitile, they can and will explode if you charge or discharge too much or too quickly. If you over charge, you kill it. If you over drain, you kill it.
If you are in a place where you get little or no signal turn off the radio. It will discharge quickly if it's searching for a signal. Also if you are not using the bluetooth or wifi turn them off, same thing. That's why they provided the Comm Manager. Try not to let your charge get below 20%. Definately don't let it run completely out or stay that way long.
A dead lithium battery will not hold a charge at all. Just like you see, the numbers dropping off quickly. It will charge fast too.

(Snot the battery)
licensedtoquill said:
Actually I am suddenly having the same problem with a brand new battery on a brand new Wizard.
Is there some specific procedure to which you are referring for hard resetting the Wizard? I assume you don't just take out the battery?
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Looking at it afresh, it isn't the battery which is heating up on installation of this ROM, it is the unit itself. The battery seems to be remaining at a comparatively normal temperature though the heat generation does drain it very quickly as I said.
Not sure that this problem has ever been addressed before on these boards? It may be something to do with not flashing to a manufacturer's ROM before flashing to Mfrazz's new one?
Has anyone ever seen these symptoms before?

In addition to some of the other posts ,you could check this :
WM6 may need to "learn" the battery levels again.
Try FULLY discharging & recharging your battery 3-4 times.
If this doesn't make things better, maybe you should check if you are running anything strange in the background...

jtrash said:
In addition to some of the other posts ,you could check this :
WM6 may need to "learn" the battery levels again.
Try FULLY discharging & recharging your battery 3-4 times.
If this doesn't make things better, maybe you should check if you are running anything strange in the background...
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Lithium batteries don't recover like ni-cad. Spend the $10 and solve the problem. DONT EVER FULLY DISCHARGE A LITHIUM-ION BATTERY. That is the quickest way to kill it.

mr.incredible said:
Lithium batteries don't recover like ni-cad. Spend the $10 and solve the problem. DONT EVER FULLY DISCHARGE A LITHIUM-ION BATTERY. That is the quickest way to kill it.
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As far as I am aware it is difficult to FULLY discharge one of those batteries in the Wizard? The unit starts giving error messages when it gets to the 15% level and some time thereafter shuts most of its functions down to prevent this. Whenever I have had problems with these units getting hot and even discharging and shutting down, the battery level never seems to be at 0% when I plug it in again. I have never thereafter found any permanent damage to the battery.
I think we should address the problem which seems to be in issue here which is that somehting in the OS is causing the battery to discharge as opposed to replacing the battery and watching the problem continue. At least, that was MY problem.
I am obviously not saying batteries don't die. All I am saying is that for a lot of users, the problem may lie elsewhere. Meanwhile I have flashed back to T-Mobile and re-flashed the newest Mfrazz which SEEMS to be quite VoIP friendly and overnight the unit doesnt seem to have heated up.

since i cant order a battery from where i live i tried reflashing my phone and memory card and i think that fixed it. maybe in my case its an os bug. and yes i definitely have been treating my battery badly on discharging and over charging. thanks for the info

They are not that delicate if you know what kills em it's pretty easy to avoid. They don't develop a memory like the older ni-cads. if you are going to store one charge it first. They don't power drain by them selves unless they are in a device. Just don't leave a battery drained. Also they wont over charge in the phone. The phone will stop charging when the battery is full, and 0% is not actually 0volts. There are built in safeguards for the average user.

[Q] How Many Times Did You Calibrate Your Battery Before You Gained Full Potential

I am now on my 2nd full charge. Drained completely and full charge while off. I have the battery calibration app and i use it. Im about to take my phone off the charger and put it to work.
How many times did you calibrate your battery before you got the full potential of it. I see some people are getting as much as 30+ hrs on their device while im getting 7-9 on moderate use.

I've never done that. Always read that draining lithium-ion batteries hurts the battery if done repeatedly. Instead I just charge to full then delete battery stats in clockworkrecovery. Battery has been great ever since that and a factory reset.

regP said:
I've never done that. Always read that draining lithium-ion batteries hurts the battery if done repeatedly. Instead I just charge to full then delete battery stats in clockworkrecovery. Battery has been great ever since that and a factory reset.
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Ill keep it till tues/wed and see what happens. If I don't see improvement ill exchange once again
Sent from my LG-P999 using XDA Premium App

regP said:
I've never done that. Always read that draining lithium-ion batteries hurts the battery if done repeatedly. Instead I just charge to full then delete battery stats in clockworkrecovery. Battery has been great ever since that and a factory reset.
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What does deleting the battery stats via ClockWork do? Do you delete them on each charge?
I was getting great battery life and then I used the calibration software and I'm getting good, but slightly less great battery life. Does uninstalling/freezing that app do anything or once it's calibrated, it's done?

The phone has a dual-core processor, and the best GPU you can get in a phone these days, so you can't expect it to get super battery life unless you never use the phone much. I did the calibration once, and have been able to go all day under moderate to heavy use. All day being 8am-7pm and still having ~20% charge.

Sadly my first g2x that I received wasn't able to go through more than 4 hours of standard use even after fully charged the 2nd time. I sent it in last Friday for exchange and now I'm waiting for the 2nd g2x to be send to me. Well see how it goes by then.

@himmelhauk - I noticed in your signature that you have the Paul O'Brien fix... I saw in that thread that that noticeably increased speed/smoothness, but I haven't heard anybody talk about its influence on their battery. Have you noticed a difference in your battery life after making that tweak?

Me
I only calibrated once, and that plus some other simple tweaks i saw great results. I usually get about 20+ hours of medium use(A few calls, non-stop texting, occasional game or youtube video, and checking email every couple of hours). If you want to see what I did you can click the link in my sig.

lobsterhead said:
What does deleting the battery stats via ClockWork do? Do you delete them on each charge?
I was getting great battery life and then I used the calibration software and I'm getting good, but slightly less great battery life. Does uninstalling/freezing that app do anything or once it's calibrated, it's done?
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it gets rid of the battery information stored within the os so that the phone reads the battery charge correctly. this was common practice for vibrant owners after flashing a new ROM. I've seen people saying that this phone has horrid battery drivers so I dunno how that will effect the battery stats but after a factory reset and deleting the stats my battery is double what I was getting on my vibrant.
I only do this after flashing a new ROM or in this case upon getting and setting the phone up. I would do it again if I swapped the battery for a different one also. just charge to 100%, reboot into clockwork, advanced menu, wipe battery stats, done. it DOES NOT increase battery life. it only allows the phone to read the battery more accurately which would keep the phone from thinking its dying when it still has considerable charge left. that's why you hear about people seeing their battery life read 1% yet the phone last for hours.

I only calibrated once because I realized the values were off a bit.

Tried every battery trick in the book. If you actually want to use the phone, nothing will help. Android is a battery eating nightmare. Hopefully one day the platform will mature so adults can use it as a business phone. I think I am returning mine or giving it to my kid.

I did a single calibration and am now seeing 20+ hours with decent usage. Fully charge the battery, use battery calibration app to erase settings, let it drain till it shuts itself off, try pressing the power button to make sure there's no remaining charge, then fully charge to 100% with the phone still off (you can tap the power button while its plugged in and off to briefly bring up a battery indicator on the screen with out actually powering up). Its true that lithium ion batteries last longer if they don't go through fully discharge cycles, but thats referring to repeated occurances, not a rare or occasional situation. And when calibrating, draining from 100 to 0 is the best method of getting a good calibration. Additionally, while its healthy to do the mid charges most of the time, about once a month or so you should do a full drain. This helps keep the calibration accurate (remember that android will continue to modify the file, albeit at a greatly reduced level after the initial discharge of a new calibration, hence why that occasional full discharge is valuable). A full discharge once a month won't significantly reduce your battery's life expectancy.

cbowens said:
let it drain till it shuts itself off, try pressing the power button to make sure there's no remaining charge
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Draining a li-ion battery past the safe shut off is an easy way to damage or completely kill the battery. Your phone is set to shutdown before complete discharge for this reason. The full discharge then charge method was for NiCd batteries. This has no use for lithium-ion batteries.

regP said:
Draining a li-ion battery past the safe shut off is an easy way to damage or completely kill the battery. Your phone is set to shutdown before complete discharge for this reason. The full discharge then charge method was for NiCd batteries. This has no use for lithium-ion batteries.
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True, but the method of attempting to power back up won't actually drain it past the safe point. The point is bad calibrations (either from the factory or by an incomplete calibration) can cause the OS to shut the phone down prematurely during your new calibration run (before the actual safe cut off), resulting in the calibration being off scale. When you attempt to power the phone back on, if it is at the true safety cut off, it won't reactivate, where as if the calibration from before was skewed, it will allow it to boot back up and finish draining down to the safety cut off. This is in line with the reports of people having incorrect readings on battery %, where they have a low number, reset the phone, and suddenly seem to jump up 10 or 20%.

lobsterhead said:
@himmelhauk - I noticed in your signature that you have the Paul O'Brien fix... I saw in that thread that that noticeably increased speed/smoothness, but I haven't heard anybody talk about its influence on their battery. Have you noticed a difference in your battery life after making that tweak?
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I honestly don't know if it made any difference on battery life, as I did the battery calibration before I installed the fix. At any rate, I get much better battery life after the calibration for certain.
Sent from my LG-P999 using XDA Premium App

cbowens said:
True, but the method of attempting to power back up won't actually drain it past the safe point. The point is bad calibrations (either from the factory or by an incomplete calibration) can cause the OS to shut the phone down prematurely during your new calibration run (before the actual safe cut off), resulting in the calibration being off scale. When you attempt to power the phone back on, if it is at the true safety cut off, it won't reactivate, where as if the calibration from before was skewed, it will allow it to boot back up and finish draining down to the safety cut off. This is in line with the reports of people having incorrect readings on battery %, where they have a low number, reset the phone, and suddenly seem to jump up 10 or 20%.
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I dunno about this phone but I know the galaxy s can still be powered on after the safe shut off and drained completely. People were doing exactly that and messing their batteries up. I would hate for people to misunderstand your post and end up making the same mistake. So the LG doesnt let you power on after the safe shutdown unless its connected to a charger? If so thats pretty good. In any case its a lot easy to just use clockwork, terminal emulator, or any other app to delete battery stats once your charged to 100%. No need to drain first

regP said:
I dunno about this phone but I know the galaxy s can still be powered on after the safe shut off and drained completely. People were doing exactly that and messing their batteries up. I would hate for people to misunderstand your post and end up making the same mistake. So the LG doesnt let you power on after the safe shutdown unless its connected to a charger? If so thats pretty good. In any case its a lot easy to just use clockwork, terminal emulator, or any other app to delete battery stats once your charged to 100%. No need to drain first
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I hadn't heard about the Galaxy S phones having that issue. Like I said, I came from the Eris and this method was the way to go with that phone, so perhaps its a manufacturer dependent function. In any case, I agree that the cwm method is better, but I meant my post to be accessable by those who may not have taken that particular plunge yet, since it only requires root. Thanks for the info though; its good to know in advanced that the safety shut off being unavoidable isn't a guarentee on all phones (though frankly it should be).
EDIT: Not sure if I'm reading it wrong, but it sounds like you thought I meant to drain the battery before calibrating, which isn't true; all you need to do precalibration is have the charge at 100%. The only time I was suggesting to drain it is during the actual calibration run, so that Android has a full scale of your battery's range. If thats not what you meant, than ignore this edit. Just wanted to make sure I was explaining myself correctly.

Also, if you open your battery cover and look at the battery, it's not suppose to go above 40 degrees celsius, or 104 degrees fahrenheit. I found that the temperature often goes past this, especially when watching movies for extended periods of time, or playing games, which leads to a significant decrease in battery life because heat and li-ion batteries are not a good combination.

andonnguyen said:
Also, if you open your battery cover and look at the battery, it's not suppose to go above 40 degrees celsius, or 104 degrees fahrenheit. I found that the temperature often goes past this, especially when watching movies for extended periods of time, or playing games, which leads to a significant decrease in battery life because heat and li-ion batteries are not a good combination.
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You can use SetCPU to make a profile according to battery temperature and underclock it when it gets to 40 degrees or something. I have profiles for when the screen is off and for temperature.

lobsterhead said:
You can use SetCPU to make a profile according to battery temperature and underclock it when it gets to 40 degrees or something. I have profiles for when the screen is off and for temperature.
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What r ur temp profiles
Sent from my LG-P999 using XDA Premium App

[Q] Draining battery on first use?

Hi guys
I should be picking up my SGS2 today and I was just wondering what exactly I should be doing with the battery? I've read in a bunch of places that draining the battery fully and then recharging it fully gives better battery life, but I've also read this:
Lithium ion batteries do not respond well to full discharge, you will see reduced capacity and early failure if it happens too often. In any case it is not possible to overcharge the battery on a BlackBerry because the battery and phone have enough intelligence to control the charge (unless the battery is already defective).
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(this is from crackberry.com but you get the idea)
What's the best thing to do?
And on Android phones, when the battery indicator shows 20% or something, is that when the phone is going to die? Or will it die at 0%? Obviously at 20% it would be to protect the battery but maybe Android has been programmed to show 0% when the battery is actually at 20%.
Thanks,
Elliott

read manuals !!!!!! You can see this

Did not receive an owners manual with my phone. Anyway...phone is charging now so too late I guess...

Starholdest said:
Did not receive an owners manual with my phone. Anyway...phone is charging now so too late I guess...
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The manual is probably stored on the phone, at least my new Ascend II came with its stored on the phone, you have to goto the big menu (forgive me for not knowing the technical term for it) to find it however

i got my battery fully charged...then in the first day i discharged it till 10% at least that's what my phone was saying
i read too that the new li-ion batteryes do not need to be "formated" (fully discharged till the phone dies and then fully charged with the phone turned off) in android case i think that thing is not posible coz it needs at least 5% to pass the bootloader and then begin to charge
anyway in my manual it says that the battery will begin the normal state after 8 days of use, until then it may disschage quick
i have a motorola defy

Calibrate the battery. Charge the phone while its switched off for about 6 hours, and then use the phone untill the entire battery runs out and it switches off on its own. After this, the phone should be able to use the battery properly.

i just used my galaxy and made it empty, then charged it full.
nowadays i have runtimes from 3days (72 hours) and then its @ about 5%

there seems to be a lot of back-and-forth regarding whether or not draining a battery is healthy; i drain my iphone battery down to zero about once a month and the battery has been doing fine for two years . . . whether it would be doing just as well without the draining time is anyone's guess.

I have always been under the impression that lit-ion batteries do not need any kind of special care or break in. But since our phones estimate the charge, we should occasionally let the battery run out to reset the calibration in case it gets screwed up.
Sent from my DROIDX using Tapatalk

I don't think you need to worry about draining the battery till it's dead. My phone dies often and the battery is still kickin It's my understanding, that the purpose of draining the phone before you charge it is to calibrate what the OS says for charge remaining to the battery's actual charge.
Or something like that...

Hi all,
I have my sgs 2 since June and it's working pretty well apart from the battery drain which is very harmful in my daily life
I've recently flashed the Cognition 1.30 (last friday). Before that, my sgs was able to last the entire day before discharging with a moderate use (10-20 mn on games, few sms, 15 mn consulting mails, 1 hr on internet). Since i've flashed with the cognition Rom, the battery drain is really awesome!!!!!!
I fully charge the phone (switched off) then when i switch it on and the phone stays idle, after 1 hr or so, i've already lost almost 20%. When i'm on internet or playing games, the battery loss is approximatively of 1% per min.
I've made a full wipe and recalibrated my battery so normally it should at least last a day and thats not the case.
Could somebody help me or should i buy a new battery and test it ?
Because i relly like this rom and from others users, it has a good feedback concerning the battery use

Innacurate battery stats?

If i charge my phone to 100%, use it for about 2-3 hours i have ~ 60%.
But if i want to restart my phone for example when it has 60%, after the restart it shows 82% or smth like that. So my question is, why the battery information isnt the same after a restart ? Is something
Another wierd battery stuff : If i charge it to 100% when using it decreseases by 2% once.
100 , 98 , 96 , then it start showing the numbers properly without skipping them.
Example. Today my battery drained and turned off like always, so the battery stat should be "0%". But when i pluged it in and after powering my phone reads the battery is 28%
What should i do? I already wiped the battery stats.

The battery percentage indicator is always just an approximation. Basically your device just gets the voltage and tries to guess the percentage with some knowledge about the behavior of the battery drain.
It's totally normal that you get different results after a reboot. I experienced this with different devices, so it's nothing specific to the Sensation.
I don't know what exactly the wiping of the battery stats does, but I would guess that you then need a few charging/discharging cycles in order to get it working properly.
Furthermore you should try to keep your battery charged all the time. Never discharge it completely, as this is one of the worst things you can do (at least with Li-Ion and/or Li-Po batteries).
Just another question: Do you have the original battery? Maybe you have some cheap battery with some cheap controller, which behaviors as such .

Its the battery from the original phone box.
Can u also please tell me how to calibrate step by step, and if u can recomment me a Sense-rom-like TaskManager for the CM7?

As said above I've no idea what "wipe battery stats" exactly does. Normally the manuals say something like "please fully charge and discharge your battery for 4 to 5 times". But maybe the "wipe battery stats" option invokes something else.
Personally I don't use any Task Manager. The general conclusion seems to be that Android (especially with the amount of RAM the Sensation got) can handle this for itself quite well. Android got some decent algorithms in order to decide whether an application is still needed and will close it (while saving most of the states within the application). When you open it the next time, Android will try to restore the state and you usually don't even realize what happened in the background. Any task manager will interfere here and shorten the battery life. So under normal circumstances you shouldn't need a task manager.
You just need to get used to the idea that the operating system decides what is best for you (or at least best for your battery life) and try to abstract a little from the "open/close" mindset we are used from our desktops for decades.

That fixed a lot of broken links in my mind.
Thanks.

If you still want to calibrate your battery (e.g. by wiping battery stats after charging it correctly and all that), just follow the general directions in these threads:
http://forum.xda-developers.com/showthread.php?t=937080
http://forum.xda-developers.com/showthread.php?p=16808932
Just be aware of the fact that Current Widget seems to be wrong values for the sensation and that you need an app to find out what apps are causing battery drain (because that function is not available in Gingerbread anymore). Please refer to my post on another thread in order to work around these limitations:
http://forum.xda-developers.com/showpost.php?p=18193397&postcount=6
Good luck!

[Q] Battery Charging & calibration query

For MB865 in perticular :
1)What difference does it make if you charge from empty to 100% in switched off stage and the same in on state? Which is better?
2)How should we calibrate the battery and how often using which app for unrooted MB865 Asia retail?
3)Also if phone dies (switches off) constantly due to insufficient charge does it harm the battery in terms of cells getting destroyed gradually? Mine dies many times mostly in night due to day usage before I charge in the morning again.
4) Does switching off or switching on the phone while charging have any effect issue on phone or the battery??
Thanks in advance for inputs for all queries.

Calibrating the battery doesn't do anything. I wouldn't even mess with it. Every once in a while, charge your battery to 100% and use it til it dies without charging. That's about it. There isn't a whole lot you can do with you battery to make it better.
Sent from my SAMSUNG-SGH-I997 using xda premium

tmease1 said:
Calibrating the battery doesn't do anything. I wouldn't even mess with it. Every once in a while, charge your battery to 100% and use it til it dies without charging. That's about it. There isn't a whole lot you can do with you battery to make it better.
Sent from my SAMSUNG-SGH-I997 using xda premium
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Thanks & I guess it covers #2 of my queries . Can't even begin to describe how much essential my Moto WPS-602-P893 external portable battery pack charger is. I have to add when I first unboxed my Atrix 2 last month (launched only recently in India) the first thing I did without switching it on, was put it on charge for straight 6-7 hours (as I remember having read somewhere that devices are charged 50% from the factory & the initial charge plays an important role in the future performance of the battery. 3G & GPS coupled with some gaming suck the battery dry pronto.

@tmease1 Are you sure? I have read and tested that resetting the battery calibrations in more accurate reporting of what apps are specifically draining your battery.
Charging when your phone is off just makes it charge faster, nothing else.
And from my knowledge of chemistry Lithium-ion batteries (the one in your phone) should not shouldn't be let reach a complete stage of discharge. (I can give you an explanation of you would like). Lithium-ion batteries are very flexible, they can be charged at any point in the cycle but again letting it completely discharge is to be avoided. It shortens the battery life by about half after a year.

farshad525hou said:
@tmease1 Are you sure? I have read and tested that resetting the battery calibrations in more accurate reporting of what apps are specifically draining your battery.
Charging when your phone is off just makes it charge faster, nothing else.
And from my knowledge of chemistry Lithium-ion batteries (the one in your phone) should not shouldn't be let reach a complete stage of discharge. (I can give you an explanation of you would like). Lithium-ion batteries are very flexible, they can be charged at any point in the cycle but again letting it completely discharge is to be avoided. It shortens the battery life by about half after a year.
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I might not be right. From my personal experience what i told him is how i run my phone. I use to be the king of trying out new things to improve battery life. I would try anything. I use to calibrate my battery after ever flash and honestly have not seen any difference since i stopped. You would think that calibrating it would do more harm than good after awhile. Google at one time said that it wasn't necessary. I don't really know for sure what to tell anyone to do. I gave up on battery up keep awhile ago. I got sick of messing with it and just carried an extra charger.
Sent from my SAMSUNG-SGH-I997 using xda premium

Whenever I flash a different ROM I reset battery in CWM. Other than that, I'll run the battery down all the way at least once a month then recharge to 100%.
Sent from my MB865 using Tapatalk 2

Thanks for all your thoughts and inputs guys.
@Farshad could u please share method for resetting the battery calibration. Just want to give it a whirl to see my experience. I am unrooted on MB865.

Not agreeing or disagreeing with either side. But here is what Battery University says.
How to Prolong Lithium-based Batteries - Battery University
Similar to a mechanical device that wears out faster with heavy use, so also does the depth of discharge (DoD) determine the cycle count. The smaller the depth of discharge, the longer the battery will last. If at all possible, avoid frequent full discharges and charge more often between uses. If full discharges cannot be avoided, try utilizing a larger battery. Partial discharge on Li-ion is fine; there is no memory and the battery does not need periodic full discharge cycles other than to calibrate the fuel gauge on a smart battery.
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Also you actually cannot completely discharge li on batteries. Doing so royally screws them up. So devices now that use them have a circuit which kicks in when they reach a minimum level telling the device to shut off.
Sent from something off of star trek

RAD7 said:
Thanks for all your thoughts and inputs guys.
@Farshad could u please share method for resetting the battery calibration. Just want to give it a whirl to see my experience. I am unrooted on MB865.
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Yeah, all you have to do is boot into CWM. Go to advanced, and there should be an option to wipte battery stats. Alternatively you could download an app just search "battery stats wiper" or something of that sort in play store.