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[FAQ]Battery

Hi guys, have 10 mins so decided to write up little explanation about batteries.
Main purpose of this thread is not "how to look after li-ion battery so it stays alive forever" but rather how to get best day to day performance without killing battery prematurely (before contract expires lol)
First of all, there is no such thing as battery conditioning or calibration with Li-Ion. When people say that, they refer to BATTERY STATS (software side) knowingly or unknowingly.
Second. Battery stats. Forget about clearing them every time you flash A ROM. ONLY do it if something is seriously wrong with battery reporting, you'll "feel" exactly when it's happening. Poor battery life is not caused just by bad stats normally, erratic and weird percentage reporting is. If you wipe stats every time you flash new ROM, it will take few full cycles to rebuild them during which you will experience poor battery life and blame the ROM obviously.
Third. Try to stick to FULL cycles as much as you can, 100%-0%-100%-0%. This helps to keep battery stats healthy.
Fourth. Discharging battery to 0% is NOT BAD! I repeat, it's not bad. That is until you start trying to discharge it completely by trying to start up the phone, or do not charge immediately (or within reasonable amount of time). Batteries are smart nowadays, and they shut down when they still have some charge left (surprise, surprise) so they don't get damaged.
This ^^^ works for any smartphone really, but keeping to full cycles help our Sensations especially, as it helps with touchscreen problems (see my or zmfl's threads).
All of the above are my findings, experimenting, searching net or discussing with other smartphone users, I have no hard data to prove it. So either believe it or don't, it's up to you. I know quite a few people who agree with the above.
If you find this useful i'd recommend making it sticky.
Any further questions will be answered to my best knowledge, and if i don't know something i'm sure fellow members will join in. I'll add more Q/A's to OP as they come.
Part 2
Bump charging.
Hmm, tough one. An odd battery will benefit from it, but most batteries wont. Bump charging will eventually damage battery and you'll be worse off in the end. Not recommended.
Battery percentage jumps up and down after reboot (Sensation specific)
Has been discussed A LOT here. There are plenty of explanations why it happens, I'm not sure if any of them correct, but the main thing is, just disregard it as it will catch up with correct % pretty soon by depleting faster/slower.

This is the best thread for battery IMO.

Thanks
likuku said:
This is the best thread for battery IMO.
Click to expand...
Click to collapse
Sent from my HTC Sensation Z710e using XDA App

Thank you! Finally, a post on battery life that is actually factual.
Still not sure about the whole "Full discharge/charge" cycles, since Li-ions prefer partial charge, but regardless. Nice one
Sent from my HTC Sensation XE with Beats Audio Z715e using XDA App

282 views and 5 votes? Seriously?

As a electrical engineer I have to disagree with some of the statements.
From what I studied it's best practice to keep your Li-Ion fully charged. Keeping your battery discharged for a long time may decrease your battery lifetime. Yes, there are safeguards, but still it isn't healthy for the battery. It's not like going under a magical barrier of 3500mV causes dmg to the battery and 3501mV causes no dmg at all. It's bull****.
How to maximize your battery life?
Do not charge your battery when you're running high demanding tasks.
Do not softreset your phone when you're charging.
Do not discharge your battery when it's not needed.
Keep your battery dry.
Do not expose your battery to temperatures above 50C or below 0C.

Cool. Very good info, will add to OP if you don't mind.
Regarding discharge, I did say that if phone dies you should charge it immediately I do not recommend "killing" it, ie trying to start phone when its dead repeatedly.
It is indeed good to keep Li-Ion topped up at all times, bit disadvantage of that is messed up battery stats, which will cause incorrect readings and premature shut down- hence bad battery life.
Jackos said:
As a electrical engineer I have to disagree with some of the statements.
From what I studied it's best practice to keep your Li-Ion fully charged. Keeping your battery discharged for a long time may decrease your battery lifetime. Yes, there are safeguards, but still it isn't healthy for the battery. It's not like going under a magical barrier of 3500mV causes dmg to the battery and 3501mV causes no dmg at all. It's bull****.
How to maximize your battery life?
Do not charge your battery when you're running high demanding tasks.
Do not softreset your phone when you're charging.
Do not discharge your battery when it's not needed.
Keep your battery dry.
Do not expose your battery to temperatures above 50C or below 0C.
Click to expand...
Click to collapse
Sent from my HTC Sensation Z710e using XDA App

Jepp, doing 100%-0%-100%-0% cycles will result in best battery "calibration", but that's just software based as you mentioned. This would be excellent for older battery types.

And very good for Android battery stats. Basically, what I posted is explanation how to keep battery stats healthy while not damaging battery. From battery point of view, yes just keep it topped up to preserve it the longest. From Stats point of view, drain,charge,drain,charge is the best thing. Both are not good for each other. But, I'd rather have healthy stats for best performance in day to day use if I had to make a choice, since Anker is only 12gbp, and if I kill one, I'll just get a new one.
OP is basically how to keep Stats/Battery balanced without affecting each other too much.
Just remember disclaimer, all of the info is what I found by reading and from personal experience. You don't have to take it for granted.
Jackos said:
Jepp, doing 100%-0%-100%-0% cycles will result in best battery "calibration", but that's just software based as you mentioned. This would be excellent for older battery types.
Click to expand...
Click to collapse
Sent from my HTC Sensation Z710e using XDA App

Nice FAQ, mate. Helpful infos imo.

Sensation Xe battery with 2 days use
i have rom ARHD 3.6.7, bricked kernel 1.5 and my battery last 2days with moderate use
i only wip battery stat once when flash new rom.

The best charging strategy (for a long battery life, in terms of persistance) for a vehicle with a range extender (e.g. used in Stuttgart in some of the Mercedes buses) is keeping the charge between 40 - 60%. Higher and lower will shorten the life of the battery more. Since these vehicles use LiIon batteries, I think it should be the same for smartphone batteries.

Sibbi said:
The best charging strategy (for a long battery life, in terms of persistance) for a vehicle with a range extender (e.g. used in Stuttgart in some of the Mercedes buses) is keeping the charge between 40 - 60%. Higher and lower will shorten the life of the battery more. Since these vehicles use LiIon batteries, I think it should be the same for smartphone batteries.
Click to expand...
Click to collapse
Not exactly. Technology is fair bit different there afaik. Also, them batteries cost thousands, Anker costs a tenner.
Purpose of this thread is not how to preserve battery longest, but how to get best performance day to day use without killing battery too soon.
Sent from my HTC Sensation Z710e using XDA App

tinky1 said:
Not exactly. Technology is fair bit different there afaik. Also, them batteries cost thousands, Anker costs a tenner.
Purpose of this thread is not how to preserve battery longest, but how to get best performance day to day use without killing battery too soon.
Sent from my HTC Sensation Z710e using XDA App
Click to expand...
Click to collapse
Cool as you know my topic was closed most of issues have been solved although battery life remain in progress. If you don't mind I will be happy to post my results from anker here in compare to stockresults as I have plenty screens to compare and both batteries have been use on exactly same setup with same use.
Sent from my Sensation using XDA App

Yeah, carry on. Just specify wherever you followed advice from the OP or not.
Sent from my HTC Sensation Z710e using XDA App

tinky1 said:
Yeah, carry on. Just specify wherever you followed advice from the OP or not.
Sent from my HTC Sensation Z710e using XDA App
Click to expand...
Click to collapse
Mostly. My topic was reopened so I will keep on posting there on regular bases however after week or two when I will finish testing will post my final results and comparison here as well. My topic is already messy so it will be kind of blog on testing battery life and because this one is clear and nice I will just upload screens with final results.
Sent from my Sensation using XDA App

Good lad. I like your style, seems very sensible
leyus said:
Mostly. My topic was reopened so I will keep on posting there on regular bases however after week or two when I will finish testing will post my final results and comparison here as well. My topic is already messy so it will be kind of blog on testing battery life and because this one is clear and nice I will just upload screens with final results.
Sent from my Sensation using XDA App
Click to expand...
Click to collapse
Sent from my HTC Sensation Z710e using XDA App

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.
Source:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Comments:
Yes I will still do my 5 full charge, discharge cycles to calibrate stats nicely but then I will try to replace my batteries before they are gone, reading that convinced me that there is no point on doing this to often, at the end of the day, how big can be impact of software stats on battery life? With this article you can clearly see that way you charge it does have massive impact. I'm not arguing that proper calibration etc. does not have it but still don't think it is that much as this article reviled.

Thanks!

Bad battery stats might simply shut down your phone before it should (say you might still have 20% left but phone thinks battery is empty).
Again, I'll repeat myself, I'll sacrifice £12 battery for the sake of having phone running longer any time, but main purpose of this thread is how to get most out of battery without sacrificing It's longevity too much too soon.
Let's not go down the route where people argue about how to preserve battery from dying for 10 years, its not the point.
Sent from my HTC Sensation Z710e using XDA App

How to calibrate your battery

I have been seeing a pretty good amount of posts lately about how to properly calibrate your battery. This is a quick step by step guide on how to do so.
I will outline 2 ways to calibrate your battery.
The first way is using a free app from the android market (easiest IMO)
The second way is using CWM.
But first.... Some common questions.
Why would I need to calibrate my battery?
Anytime you flash a new rom it is recommended to calibrate your battery to optimize the battery life of your device.
You can calibrate your battery at anytime if you believe you should be getting better battery life.
How does it work?
When you calibrate your battery you are wiping your batterystats.bin. This allows for your operating system to create new battery stats that can drastically improve your battery life.
Using battery calibration app
First, install Battery Calibration by NéMa from the android market.
Once installed...
1. Charge your phone to 100%
2. Without unplugging your phone... open battery calibration
3. You will have to allow root permissions if first time using the app. Make sure the app says your phone is charged to 100% as well. Your voltage should be 4200mV or as close as possible.
4. Click on battery calibration in the middle of the screen.
5. Unplug your phone.
Now your battery stats are fully wiped. To fully create new clean stats follow the next steps.
6. Without charging your phone at all... let it die completely until it shuts off.
7. Plug your phone in and without a break let it charge to 100%
8. Unplug your phone
9. Let your phone die completely until it shuts off.
10. Fully charge your phone to 100% battery again.
11. Unplug your phone.
12. Let your phone die completely until it shuts off (last time)
13. Charge your phone back to 100% again.
CONGRATS! Your battery is fully calibrated!!
Note: it is recommended to do 4 full cycles to completely calibrate your battery but you should notice a difference after the first cycle.
USING CWM
1. Charge your phone to 100% full.
2. Reboot to CWM (recovery)
3. Scroll down using volume keys and choose advanced
4. Choose wipe battery stats
5. Reboot phone.
Now your battery stats are wiped. To fully create new clean battery stats follow steps 6 through 13 above.
As stated this is just a quick guide for reference for anyone having questions regarding calibrating your battery. If I have left anything out feel free to mention and I will add it in asap.
If this post helped you please hit the thanks button

These threads are useful too.
http://forum.xda-developers.com/showthread.php?t=1334950&page=2
http://forum.xda-developers.com/showpost.php?p=16771651&postcount=41
The second is from the Tab forum, but apparently our phones have the same MAX17042 fuel gauge chip which reads open circuit voltage to provide battery stats. As Vlad_z states, deleting the log file does not actually calibrate the battery, this is done automatically with the MAX17042 chip. The 2nd link does give instructions on how to reset / calibrate this chip without a jig.

I have definitely noticed a difference after using the battery calibration app as well as clearing battery stats through CWM.
I did try vlad_z calibration as well. I am still in the process of letting my battery die currently for a comparison. However it has been about 26 hours and I still have 37% battery left with moderate use.
I will be updating the OP to contain Vlad_z procedure as well

Nice post. I always just calibrate through cwm when I hit full charge. I never do three complete drains and recharges though. Usually one complete drain one complete charge and then use my phone as normal. Have you really noticed a difference doing four full cycles?
also it step 6. I've found if you power the phone back on after it dies it will truly kill the battery.
Still cool to get over 36 hours of use on this phone. Almost as good as my old dumb phone(which I sorely miss).

I have 5 batteries for this phone. 2 are 1500mAh and 3 are 1800mAh.
I assume I would have to recalibrate for each battery?

arclite00 said:
I have 5 batteries for this phone. 2 are 1500mAh and 3 are 1800mAh.
I assume I would have to recalibrate for each battery?
Click to expand...
Click to collapse
What do you need all that power for? Do you have five devices? I Would think you would calibrate based on which mah you are using since you are only deleting a file on your phone. I.e once for 1500 and only use those batteries.
Sent from my SGH-T959V using XDA App

arclite00 said:
I have 5 batteries for this phone. 2 are 1500mAh and 3 are 1800mAh.
I assume I would have to recalibrate for each battery?
Click to expand...
Click to collapse
Internal memory of the fuel gauge chip has room for two battery profiles, it cannot hold 5... so, if you are using all 5 then state of charge (soc) reported back to OS level would be pretty much inaccurate.
You can delete batterystats.bin all day long with cwm or apps - this is just as usefull as dancing with rainstick around your phone.
If you absolutely need multiple batteries then stick with same nominal 1500 or 1800. That way fg chip would report average value, granted your batteries should be the same age and health.

Posts like these are truly helpful, This should be sticked imho. I'm a complete noob to flashing, just performed my first two flashes last night, and it's a job trying to scour through these forums and read through all the posts trying to find the information you are looking for. I did it, and I'm very happy with the results. Damned if I was going to ask a question on these forums. you guys got me scared. hehe.
Anyway thanks, as this was the next piece of info I was hunting for!

Hello,
I have three batteries : 2x Original 1560 mAH and 1x 2430 mAH
How to calibrate them with my HTC Sensation ?

adlene72 said:
Hello,
I have three batteries : 2x Original 1560 mAH and 1x 2430 mAH
How to calibrate them with my HTC Sensation ?
Click to expand...
Click to collapse
If you are rooted, you can use the app from the market
Sent from my SGH-T959V using xda premium

In charging after fully discharging the phone, do i charge it while it is off or can i charge it while it's on?

Battery calibration by deleting the file is now known to be complete snake oil. Confirmed in the code as well. Deep discharge cycles, along with heat, are enemies of Li ion batteries. While it seemed a very good idea at the time, following this procedure is now known to be only detrimental to battery life, even if it makes people feel good.
Posted from my SGS4G, thanks to Team Acid development

Jeff is correct. Since these instructions the myth about battery calibration has been debunked
Sent from my SGH-T959V using xda app-developers app

jeffsf said:
Battery calibration by deleting the file is now known to be complete snake oil. Confirmed in the code as well. Deep discharge cycles, along with heat, are enemies of Li ion batteries. While it seemed a very good idea at the time, following this procedure is now known to be only detrimental to battery life, even if it makes people feel good.
Posted from my SGS4G, thanks to Team Acid development
Click to expand...
Click to collapse
So whats the proper charging way now? Thanks for the info though!
Sent from my LT26i using xda app-developers app

darkace007 said:
So whats the proper charging way now? Thanks for the info though!
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
Keep the phone between 20-85% otherwise heat will destroy the battery. Charge the phone as often as you can and avoid extra heat from charging.

help..
pls help me.after doing battery calibaration?my battery % was 0 only.how am i gonna fix that?even though i charge so many times.it get 0 % only.pls help me fix that problem.tnx

Necro-rez of a tread that has already stated "don't do this" ain't gonna fix it for you. Why don't you post what your hardware, firmware, and software are in another thread, along with very clearly detailed description of what you did and what happened (with what you expected to happen, if different).
Without that, "Not a bug" "Move along, nothing to see here."

after pressing "calibrate" from app and unplug phone from charger, do i have to let the phone discharged without it being disturbed from any battery usage activities e.g. messaging, play games, browsing internet etc? or I can use the phone while it discharges? i hope to not defeat the purpose of calibrating the battery.

adhawk said:
i hope to not defeat the purpose of calibrating the battery.
Click to expand...
Click to collapse
There is no purpose for this kind of "battery calibration" process. It has been thoroughly debunked. It is generally accepted, however, that deep cycling of the batteries shortens their lifespan.

do i need to charge it off, after draining the battery ?

Battery must be recalibrated on each rom update?

Hi every one,
I was wondering if there is need to recalibrate the battery on each rom update, custom and lg official releases?
Also i bought a 1900mAh battery so I think it need to calibrated for better performance?
Any advice will be great
Sent from my LG-P920 using xda premium

no.
Battery calibration does not affect battery performance, it just changes the accuracy of the battery %age display. There is also no way of calibrating the battery, as it is directly read from the li-ion battery itself. Deleting the batterystats.bin Does nothing besides resetting androids About Phone>Battery Use data - which already resets itself on a full charge (And also broken on O3D GB Roms)
Its actually likely that calibrating the continually will eventually result in considerably worse battery life, as li-ion batteries are best operated between 20-80% charge.

oyanezg said:
Hi every one,
I was wondering if there is need to recalibrate the battery on each rom update, custom and lg official releases?
Also i bought a 1900mAh battery so I think it need to calibrated for better performance?
Any advice will be great
Sent from my LG-P920 using xda premium
Click to expand...
Click to collapse
I saw on the battery calibration app, that it must be recalibrated, since each rom has diferent files to manage power, and it will actually help the battery managment.
Thats what i know, im not an Expert.

tachi_do said:
I saw on the battery calibration app, that it must be recalibrated, since each rom has diferent files to manage power, and it will actually help the battery managment.
Thats what i know, im not an Expert.
Click to expand...
Click to collapse
I saw that too, on battery Calibration by NEMA it says:
calibration needs to be done after flashing a new ROM. but you calibrate.. etc. the whole message that why my initial post was about, I saw other posts saynig that it must so ill do it just in case I dont think that will do anyharm at all.

wasn´t calibration just a matter of charging till 100% when off, then remove battery, insert battery and then start phone and plug again??
i do this and my battery it's all good, although i cna't watch a video for more than 3 hrs hahahaha

It actually worked on my ZTE Blade. I believe it's called overcharging.

hi
i dont think so need callibration after each new rom!
it might harmful for battery!

[Q] Wrong battery percentage???

Hello all!
Ive noticed rather unusual thing. For example - when i get around 50% of battery left i can reboot the device and get about 80% but of coz its dropping faster then normal charged %.
Iam on mugen 1950 mah and have done wiping battery stats and done the calibration.
ROM - HyperNonSence 1.5 with faux 006u kernel.
Any suggestions?
Thanks all in advance!

Yeah this has happened with every Android phone and every battery I've had.
Don't think there is anything you can do about it to be honest. You could reboot it again and sometimes the indicator will fall closer to where it was before.
Or you can use it i.e. play a game or browse the web and usually it will fall to a more accurate level.
Alternatively, just plug it back in and wait till it charges to 100%, unplug and then reboot. If it is still green then it's likely charged fully.

So, it stays 100% after reboot rly long, its true fully charged.
Iam not crying about my battery life, i think its OK, but it can be better of coz =)))
F.e. on my HTC G2 i havent got this problem - percentage raises only for 3-5% after reboot not for 30% like on Sensation. BTW both batteries are Mugen.
Maybe i should try Mugen calibration tool? but seems to me its just a simple original calibration tool.
But TY anyway =p

Wiping the stats through recovery did not help? I do this with every new rom. Perhaps a app from market might help?
Sent from my Sensation 4G using xda premium

WarcoLLapsE said:
So, it stays 100% after reboot rly long, its true fully charged.
Iam not crying about my battery life, i think its OK, but it can be better of coz =)))
F.e. on my HTC G2 i havent got this problem - percentage raises only for 3-5% after reboot not for 30% like on Sensation. BTW both batteries are Mugen.
Maybe i should try Mugen calibration tool? but seems to me its just a simple original calibration tool.
But TY anyway =p
Click to expand...
Click to collapse
I'd say so.
Try the Mugen tool as that might help.

Iam wiping battery stats with every new flashing. Its like a Bible =)
OK, ill try mugen soft from market.

2450mAh battery?!?!

has anyone tried this?
http://www.ebay.com/itm/2450mAh-Hig...755988?pt=PDA_Accessories&hash=item3f1a4652d4

Grooby97 said:
has anyone tried this?
http://www.ebay.com/itm/2450mAh-Hig...755988?pt=PDA_Accessories&hash=item3f1a4652d4
Click to expand...
Click to collapse
Yes I'm using it right now.. :laugh:

Fakhri 19 said:
Yes I'm using it right now.. :laugh:
Click to expand...
Click to collapse
what is your opinion of it? also is it the same size as the original battery?

Im using it along with an anker 1900 battery. They both preform the same to my usage
It is a heavier battery than my anker though.

Grooby97 said:
what is your opinion of it? also is it the same size as the original battery?
Click to expand...
Click to collapse
yup, same size with the original. It felt a lot better, few hours longer battery life.
E.g. : if you just keep the phone idle for 5 hours, it sill 100% remain.
sorry for my english

Grooby97 said:
has anyone tried this?
http://www.ebay.com/itm/2450mAh-Hig...755988?pt=PDA_Accessories&hash=item3f1a4652d4
Click to expand...
Click to collapse
I bought this battery in 2011y on ebay that claimed to be 2450mAh but it was only 1400-1500mAh.
Original battery works for me (on JB ROM) around 18-24h, with this fake - around 20-26h.
Sry my english... =)

Buy batteries from a reputable dealer, too many counterfeit ones going around! I just bought mugen 3600 directly from mugen, it's been amazing! Highly recommend! It's worth the cost !
sent from HTC sensation, soff, 3.33 firmware, viper Rom, sense 4.1, mugen battery. please press thanks if I helped in anyway.

Just bought one in Spain from eBay too. 8.5 eur, free shipping. I'll discharge it first to 0( it came 70% charged), then I'll run nova battery tester benchmark and post results. The stock battery gave me 1420mah until the phone switched off at 1% on the long test of that app. Using pydx kernel, elegancia 5 rom.
Sent from my HTC Sensation Z710e using xda app-developers app

Sorry, can't test it. This app shows me 0mah with that battery and always 25C temperature
Sent from my HTC Sensation Z710e using xda app-developers app

2450mAh battery
i also bought it before 1 year ago,actually is not 2450mAh but around 1500-1600mAh but it does jobif you want buy it its cheap you dont have nothing to loose
DREAMkin said:
I bought this battery in 2011y on ebay that claimed to be 2450mAh but it was only 1400-1500mAh.
Original battery works for me (on JB ROM) around 18-24h, with this fake - around 20-26h.
Sry my english... =)
Click to expand...
Click to collapse

^ wow, not too shabby.
Sent from my SGH-I747 using Tapatalk 2

bcome said:
How well does it perform compared to the Anker one? The most I've gotten out of my Anker so far is three and a half day, but that is without using it a lot. I find that it mostly depends on the ROM you're using tho, and due to that I prefer the sensless ROMs, because they seem to run a lot lighter than their Sense counterparts. But hey, that's my observation.
Click to expand...
Click to collapse
What's your screen on time?
Someone got 4 days, 2h40m screen and 45 min in call using anker battery.
Skipjacks said:
Okay I want to put this business about bad battery life and battery bugs and all that jazz to bed.
Look at my battery graph. I rest my case.
Any battery problems are not with the ROM. It's clearly capable of having disgustingly good battery life.
That's 4 DAYS since unplugging with 8% battery life left as of right now.
That includes 2 hours and 40 minutes of screen on time
45 minutes of phone talk time
This is on the April 26th build. And this is the FIRST charge since flashing that build. So the battery use probably isn't even maximized yet.
My settings are OnDemand 192 - 1242
Anker battery
Auto Brightness is off and I use the notification bar swipe to adjust brightness as needed
Alterations made to the Google Services Framework to eliminate Google Wakelocks (this has nothing to do with Albino's code, hence it's not the ROM) Click here for more details
Greenify to keep other wakelocky apps on a short leash. (I'm looking at you T Mobile's My Account app. You're so useful but you think you own the place!)
Haptic feedback is off for everything. The only thing that's allowed to use the vibration function is the ringer (I don't use a ringtone, vibrate only) and reminder notifications. If you have haptic feedback on for every press on the screen and keyboard you are basically giving up battery power to run a small electric motor. That's not an efficient use of limited battery life.
Full disclosure. I don't keep mobile data on all the time. I turn it on as needed. And I've been very busy doing other stuff the past 4 days so there hasn't been a ton of use time. Obviously if I had been using it more it wouldn't have lasted 4 days. But if the ROM can idle for 4 days and not drain itself dry, then battery problems aren't in the ROM. They are with apps, settings, or user error. Albino's ROM can be configured to run for what may as well be for freakin' ever on a single charge. I'm half expecting him to add "sustainable cold nuclear fusion" to the changelog of the next build.
So if you've got battery issues, go buy an Anker before you do anything else. Even if you have other problem that will make everything better. And stop talking about battery issues in this thread. Come to the FAQ thread (see link in my signature) and ask questions about how to improve battery life there. We'll take all battery questions there with a smile and be glad to help you, where in this thread battery questions will be met with verbal beratement for clogging up the thread with whining.
Click to expand...
Click to collapse

dont mess with these batterys
they usualy fake, has a wrap that can be removed, and then you will see its says 1600~mah
the anker and mugen 1950 are real 1950 mah and the max power u can get without extending the case(anker is cheaper thou so its more recommended)