Develop Bugs

(TIP)Possible battery drain solution for LTE devices.

Like many here I've been having battery drain issues since the day I purchased the Galaxy Nexus. I also purchased the extended battery since day one. I've been reading through every single forum on how to reduce the battery drain and none seems to have worked for me. I've tried switching to wifi, 3g only, no email push, no google+, etc and my phone at 100% battery would lose almost 30% within 2 hours idling. Then I was looking at the settings and I came across the Developer Options/Background process limit and limited my background process from Standard to At most limit to 1 process and my battery has improved tremendously. Prior to making the change the Android OS was using 80+ % on idle (Wifi or 3g didn't make a difference), now it's uses around 20 or less. On idle I'm seeing around 4% or less an hour vs 15% battery drain.
Please remember this may or may not solve YOUR battery drain, but it has definitely helped mine and I just wanted to share with the community on what else you can try.

I've had pretty good results with my battery. I think some of ya'll are either just playing around with it too much or have some energy-sucking apps out there.
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Cheyse said:
I've had pretty good results with my battery. I think some of ya'll are either just playing around with it too much or have some energy-sucking apps out there.
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Or that you don't have a connection to the data network.
Just say'n. (I do the same thing at night)

I had Wi-fi enabled for 12 hours, and the battery only dropped to around 85%. I have been on 4G for 5 hours now, and the battery is now down to 13%. I'm going to use a Wi-fi/3G combination tomorrow. Oh and I also have my phone rooted/underclocked to 900Mhz.

Cheyse said:
I've had pretty good results with my battery. I think some of ya'll are either just playing around with it too much or have some energy-sucking apps out there.
https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/397858_10100550605299635_27421897_51271764_409359273_n.jpg[IMG][/QUOTE]
Light use with very little screen time from the looks.
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cvbcbcmv said:
Remember things in the dev section are there for a reason, this could cause other issues.
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I've been using it for 3 days and have had no issues. Anyways its as easy as checking the standard limit if you ever wanted to revert back.

Battery calibration

I recently purchased a seidio 3800mah extended battery. Currently I'm only on the first few cycles and I found an app that is supposed to read the battery may but it is reporting it the same as stock. Do I need to calibrate the battery or do anything to get the phone to fully take use of the extra power currently the battery life feels about the same as stock. Thanks in advance for any advice you might have to offer.
Sent from my Galaxy Nexus using XDA

Battery calibration doesn't do anything. Well documented.

I also have this same battery and use Battery Monitor Widget Pro. While the app allows me to set up a custom battery, with a different capacity, the app has never been able to show a "estimated capacity" larger than 2048mAh. Rather disappointing considering that on my EVO 4G, while it never read the 3500mAh that it was supposed to be, it would reflect something closer. I think it was usually around 3300mAh. I never even bothered with the stock battery on this phone, and I have been in horrible reception areas whilst roaming the entire time I have had the phone. Should be going home in a couple weeks, if I can get the same 2 1/2 days out of it there then I won't worry any more.

Okay. So if there is no need for calibration that means I shouldn't need to do anything after the installation of the larger battery correct?
Sent from my Galaxy Nexus using XDA

So, if I understand you own the battery that I do? If so I'm going to take a screen shot of its life when its near empty, I would like to compare them if possible.
Sent from my Galaxy Nexus using XDA

This is the one I have:
BACY38SSGNLN-BK Seidio Innocell 3800 Extended Life Battery with NFC for Samsung Galaxy Nexus
Not sure what it is you want to compare? I will not be in a decent signal area until after the 18th. Once I get home, I can run a full charge/discharge cycle on it a take screenshots, until then i probably won't be of much help. I'm roaming 100% of the time with an average time without signal of 45% right now so I don't get good life out of it.
MHHubris said:
So, if I understand you own the battery that I do? If so I'm going to take a screen shot of its life when its near empty, I would like to compare them if possible.
Sent from my Galaxy Nexus using XDA
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bbv203 said:
This is the one I have:
BACY38SSGNLN-BK Seidio Innocell 3800 Extended Life Battery with NFC for Samsung Galaxy Nexus
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Did I get a defective battery?

Just got my s3 like a week or so. I made a mistake and not charge it initially (thought it was a myth). I used my battery all the way to 17%. Now my battery only average up to 2 hours screen on. My sister who also got the phone as the same time has about right hour screen on time. Did I screw up or it's just my battery being defective
EDIT: attached is the battery stats
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Sent from my SGH-T999 using xda app-developers app

What's brightness set to, and what are you doing while the screen is on? You on WiFi most of the time?

mt3g said:
What's brightness set to, and what are you doing while the screen is on? You on WiFi most of the time?
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Well, when I'm in door, I use low brightness most of the time. Only when I'm outside I would use auto brightness. Since I'm in wifi zone most of the time, yes I do have wifi on. I mostly use my phone for twitter, web browsing, and youtube, nothing heavy like gaming or benchmark.

Hard to say if its defective but I've definitely seen a lot better battery. It might not hurt to try and get a new one.
Sent from my SGH-T999 using xda premium

you should calibrate your battery a couple times once you get the phone. do it a couple times and it will fix itself. also check all your syncing settings. this phone will deplete a battery in 5-6 hours if fully charged and phone brightness is up all the way while watching videos.

Calibrating batteries is a myth from the days of older battery technology. Draining your battery to 0 on purpose is actually killing your battery faster because you just used up one cycle.

gr4p3s said:
Calibrating batteries is a myth from the days of older battery technology. Draining your battery to 0 on purpose is actually killing your battery faster because you just used up one cycle.
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I think you're right
Sent from my SGH-T999 using xda premium

There's a bug on stock that makes cell standby much higher than it really is. So I wouldn't worry too much about that.
Also, Google Chrome is a huge battery killer for some reason. Consider switching to a different browser?

Still having the original battery in my vibrant and getting 8-9 hour charges while killing the battery 100% and charging it up once a week does nothing? Same thing for my g2x. I get about 10-11 hours on the thing daily original battery as well. If anything and you're not rooted to delete battery stats, its a good thing to do a couple times. I don't think I have hurt the battery at all, and if anything they still last very long...
Sent from my SGH-T999 using xda app-developers app

How is the battery life on TouchWiz Jellybean?

I've been using CM10, and very few times has the battery life been that good. I'm not talking about when I'm not using it, I've reduced that a bit, I'm talking about when using the device. Overnight, it only drains like 10% (still more than I'd like but I'm taking measures to make it less), but when I'm actually using the device, it drains really rapidly. Like, I'll lose 10% in 20 minutes just using Facebook, Instagram, Pulse, etc. I've had it on airplane mode overnight one time and it didn't lose a percent, so I don't think I have a bad battery. So I'm thinking it might be the OS, but I don't know, how is everyone else's battery on TouchWiz, and have you used CM10 before and had bad battery?

Heres my stats for today
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I've got 2 hr 30 min of screen time at auto brightness
10 min talk time
Around an hourish of listening to music
I keep autosync, bluetooth, and gps off. Nfc and s beam on, im using ktoons kernel and running ktoonservative governor at 1.5 ghz.
This is what I've been usually getting day to day, i cant say how much facebook uses as i dont keep track, and i dont use instagram.
Ive been on task's aokp 4.1.1 and my battery life was about the same, maybe a little better. Overall, ever since i turned off gps and autosync ive been satisfied with my battery (as i dont need either on a daily basis) Hope this helps
Sent from my SAMSUNG-SGH-I747 using xda premium

Hmmm well like I said, while I could eliminate more background data, I think I'm fine with the data side of things. I also freeze my Google Maps app so it doesn't keep on turning on, but I do keep my GPS on. It just seems like a huge drain when I'm using apps, like I mean some CM10 nightlies seem to drain slower than others, but if you say your battery was about the same between OS's, then I guess it's just me imagining it. I always thought the GSIII would last longer though, on paper it lasts longer than an iPhone, but it sure as hell doesn't do it in real life lol. It's what I switched from and one of the reasons why I picked the GSIII over the iPhone 5, but ugh messing around with the battery is such a pain.

Haha yeah its a pain, but when you get it the way you want it's amazing. Also keep in mind that your signal strength, LTE connections, and how much you use wifi over data will also play a factor
Sent from my SAMSUNG-SGH-I747 using xda premium

[Q] Is my battery runtime normal?

Hi everybody,
i'm running on Paranoid 3.6 und AK256 Kernel, and these are my battery stats.
Used the phone alot during the lectures today, tested this halo stuff (really don't like it).
But ~9h is just too little or?
System is just 2 weeks old, so pretty clean i think.
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What's your on-screen time?
Sent from my Cyanogen-flavoured, AK-powered Galaxy Nexus

It was about 2.5 hours screen on time.
My stats for today are attached.
Screen on time is 3h 5min. The almost horizontal line at the beginning is in airplane mode but with wifi on.
Is this okay? It feels like that this is way too little runtime :/
Thanks a lot !

seems fine to me.

That's about average battery life for me. If I stand right in front of the wifi router + good 3G signal I can maybe get 3.5-4 hours screen on time. Else its usually about 3 hours on full wifi. Or 1-2.5 hours on full 3G or mix of 3g/wifi depending on the day and the brightness.

3hrs is my normal. Just go out n buy a separate charger and another battery or two (that's what I did) and u just have an extra battery on hand when u need it
Sent from my Galaxy Nexus using xda app-developers app

Do I need a new battery?
Hi guys it's me again,
NOW I think my battery drains way too fast, I don't use my phone that often but I can't make it over one day!
Here are some screens, i know i've got 30 % left, but thats gone pretty soon
I'm running on Purity 5.7.1 (Android 4.2.2) and Fancy Kernel r36 extended version for quite a long time now.
Is my battery too old and damaged, should i purchase a new one?
Big thanks for any help !

Yeah, it's normal.

You're last longer then I do
Sent from my Galaxy Nexus