Develop Bugs

Battery life stats and questions

What's a good figure for battery life on the GS3? The best I've got is about 31 hours using on demand and bfq. Any one got better life using other settings? I heard someone getting about 43 hours life but that seemed to be a little unbelievable. Let me know what your getting
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What you reported is definitely "the average". Most actually only get a day, if they're lucky of moderate use and have to plug in before sleep every evening and get going on charge in morning. So its more like 15 hours actually. And your 31 max is very common high end for people who've stretched it out.
I'm not sure if you're stock rom or not and if rooted either but that makes a big difference.
I'm rooted ( and would ALWAYS RECOMMEND ROOT FOR EVERYONE EVEN UF NOT FLASHING ANY ROMS AND STAYING ON STOCK. The ability to have full control is important.
Changing kernels and more importantly, undervolting, will give you that longer life you're looking for.
I'm currently on KyanROM with either Ktoonez or Faux kernel (heavily tweaking and testing both) and have this phone beautifully undervolted to exceptionally low and very stable mv numbers! Thus getting me that lovely 36-45hour average (you mentioned you saw posted elsewhere - yes it is possible and many are doing it). I basically only need to plug in every OTHER EVENING or night between 6pm and midnight depending on usage and I'm a moderate to heavy user (with a lovely 3-5 hours of screen time as well) AND I also have my phone overclocked to 1.8Ghz! Surprisingly, the oc doesn't make much battery life impact at all because the phone isn't constantly having to run at high levels, only in short spurts. Actually, due to rooting and kernel change I'm able to have my phone run as low as 192Mhz during much of its general activity and deep sleep ( which I get a ton of as my phone basically always goes into it when the screen goes off). This saves me A LOT of battery life.
I also use LTE, which is actually one of the biggest if not the largest battery hog, next to screen time of course. But with that being said I only use it when needed and have it turned off when not in use.
As for my peak I was able to squeeeeeze out 87 hours once, on my stock battery BUT that was with some abnormal(for me) measures that really help conservation. Ie, no LTE, under clocked to 1.2Ghz for good part of the three days, much less then normal screen time over the period of which I used it at lowest level with even further reduction via screen filter, I actually used airplane mode during my three overnight sleeps (which I seldom use but if you can hack it, do it! It can really save battery overnight. My current setup basically SIPS MY BATTERY AT 1% EVERY 3.5-4 HOURS OVERNIGHT WHEN IN AIRPLANE MODE), mobile data was off for most of time but did use my wifi at normal level (wifi uses less especially if good signal with few reconnects/scans), used my typical low UV numbers, kept my notification updates/syncs/wakelocks to a minimum and lastly kept my memory virtually clear if unnecessary background apps.
Doing ALL of this allowed me to get OVER THREE DAYS BATTERY LIFE. But keep in mind I seldom do many of these battery saving tips on a regular basis but some do and if you can, they WILL work to extend your life substantially!
To wrap up (this long winded post/reply) I'll give you my general UV mv range numbers and the typical everyday simple battery saving methods I use.
1.My voltage at lowest clock of 192mhz=800mv with gradual (smooth and almost linear curve) increase up to a mere 1200mv at a whopping 1.890Ghz clock.
I use NOOP scheduler with ONDEMAND governor most of the time, sometimes SmartassV2.
My screen off and deep sleep use this lowest 192 clock speed and with no wakeup lag.
2. I use my screen at 0% brightness most of the time (except when outside or in high lighting environment). I use the brighrness widget app to control this as it is easier and works better then stock settings. I actually even further reduce my brightness with Scree Filter App. That app is awesome and often use it solely for brightness control because it has full control and can dim it to basically full black if wanted. Which is MUXH lower then stock control. Fyi I use my phone a LOT more at night or in dark environment thus allowing me to dim screen HEAVILY yet it still is actually plenty bright with ample contrast in dark environments to do everything. This saves on my battery HUGE!
3. I use LTE when needed and GSM/HSPA+ when not. Seldom turn of mobile data altogether. I do turn off wifi when out and only using mobile data.
4. I use Screebl app to have screen turn off when not in use. Its great liitle app. Basically let's you turn down screen timeout to 15 seconds or less so screen is never unnecessarily on but it always stays on when in use due to the accelerometer and it knows when the screen is not flat on table! Its very annoying when browsing or doing stuff where screen isn't touched for long periods and the screen goes to sleep! But this stops that! So its always on when upright or in use and when phone down it turns off immediately.
5. Very important step and can take some time and research but making sure to keep partial wakelocks and apps keeping device awake to a bare minimum! DEEP SLEEP IS VERY IMPORTANT TO SAVE BATTERY! You basically want it to go into that every time your screen goes off and to stay in it uninterrupted for as long as possible. And many users phones are NOT making it into deep sleep due to partial wakelocks and they don't even know it or how to fix it. Not getting deep sleep can unnecessarily kill your battery!
I use a few tools here: Better Battery Stats/GSAM Battery Monitor/Battery Monitor Widget from within System Tuner Pro (which is my also my main and highly recommended tuner app for CPU oc/uc and UV,etc.).
These apps really help to determine what, if any, apps are causing partial wakelocks ( displaying in wake number amounts and overall wake time) allowing you to determine what to do to fix the problem and let the phone gets as much battery saving deep sleep as possible.
6.I'm not big on auto app killers and actually recommend against them as Android ICS does this already very effectively but do keep in mind that the more active background memory that is used, the more battery the battery is drained. So I personally kill unnecessary apps myself from the background whenever possible to save a little battery here and there. Using the apps listed above in #5 can really help to detect a nasty background app or service that is quite possibly unknowingly using a ton of CPU and/or memory, thus draining more battery and also often just slowing down your phone!
7. For those who can use it Airplane Mode is a big saver! Try overnights if wanted as long as missing notifications, emails, calls, updates, etc is alright for you. I seldom use it but it does help.
8. I almost never use my Bluetooth and GPS but when I do that is the ONLY time they are on. They get turned off immediately and really be careful with the GPS in particular because you might be surprised how many things on your phone will use it in the background, sucking your battery!
9. Be careful with sound and vibration levels. Haptic feedback too. I don't do much here but its anotherctip nonetheless.
10. Lastly is treating and charging your battery right! I found an amazing site linked down below in a couple of articles that really explains these batteries and how they work in a very in depth technical level this is still not too hard to follow. Aside from the two links I posted check out the others on the left menu as there is a ton of useful and educational info!
http://batteryuniversity.com/learn/article/how_to_increase_the_runtime_of_your_wireless_device
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
OK I've rambled on waaay too long here. Maybe I'll take this and post a battery savings tips thread with it lol. "10 points"!
Btw I've just received both my 3300mAh and 4400mAh capacity batteries. So I have much testing to do on those too and I plan on reporting back on them as well. Also with screenshots for data and proof...I can and will also post screenshots for all of the numbers and stats I've posted here today with my personal phone/battery accomplishments.
Hope this helps some of you out there because yes this phone can be known for terrible battery life but it CAN be tweaked to SUBSTANTIALLY IMPROVE that life to high standards and keep up with the best of them!
Sent from my SGH-I747M using xda premium
On Stock battery - Kyan Rom/Ktoonez kernel (at this moment)

Seems about right. My phone is completely stock and if I really wanted to I could even use it for 2 work days. I usually charge it over night though. I used it for 2 days though while at work, and with 3 hours of screen on time I was down to 7% battery. Around 40 hours on.

I was stocked rooted using Sammy kernel. On demand BFQ. I'll try on demand noop and see if that helps. My screen was about 35% brightness.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

Can I hijack a little here? My battery seems to be atrocious. It was okay stock after my first 3 full charges I was getting about 12 hours and 2.5 screen time.
Here is what I've done with my phone since:
Flashed to debloated stock Rom
disabled remaining unneeded apps (example ATT wifi app)
disabled Wifi
disabled bluetooth
disabled GPS
disabled GPS autorun states
disabled 4g
disabled autobrightness, set to 15%
disabled location reporting
disabled Push email with Exchange
disabled Motion
disabled auto google backup
disabled keytones and vibrate on all button presses
disabled touch key lights
disabled Svoice
disabled streaming on googleplay, only plays from memory card
disabled Google Now
fixed the cell standby bug (even though it may not impact battery figured wth)
Uninstalled FB
Set all Autosync accounts and email to sync only once per day
No widgets (only Google play music, Smemo note, flashlight, and folders)
Running save power mode for low power screen, no haptic, and auto adjust screen to blacks
Running mostly black wallpaper, No live wallpaper.
Running medium intensity vibration
I ran battery stats and got a lot of wakelocks from googlemaps and exchange so I disabled the push email and set it to once a day. Google maps I disabled latitude, and shut down the autostarts with gemini.
It's getting to the point where the phone is basically a dumbphone just so the battery can make it while it sits next to me at work. Today I have 48% after 8 hours and 50 minute screen time and 20 minutes of google play (only playing from on SD card not streaming).
Any ideas? It seems like I'm getting less than average.

All I did was also flash debloated rooted stock. Set to top out at 1.5ghz power save on. On demand BFQ schedule. Screen brightness as low as I can to still read. And got 32ish hours. I'm going to try OnDemand and noop like the other guy said and UV a lot more and see how close to 40 hours I can get
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

chrisj22 said:
All I did was also flash debloated rooted stock. Set to top out at 1.5ghz power save on. On demand BFQ schedule. Screen brightness as low as I can to still read. And got 32ish hours. I'm going to try OnDemand and noop like the other guy said and UV a lot more and see how close to 40 hours I can get
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
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Can u link me on the bfq? Having troublefinding what that is.
Also, is that the built in power save that limits the processor or some other software?

I believe if you flash Sammy kernel it has bfq. I am on task's CM10 and kernel and battery life seems poor compared to CM9 or stock rooted
Sent from my SGH-I747 using xda app-developers app

[Q] Possible battery life degradation with JB OTA update?

Thanks to everyone who got the URL out for the official JB OTA.
I have immediately noticed higher battery drain. Google Now is turned on. 1 hour and 40 minutes uptime from full charge, battery is at 67%. After checking battery stats, I see that Android System has consumed 64%, while the screen is at 14%. The screen power draw has always been the highest. In fact, before the update, the screen usage would probably read somewhere around 70%, and the overall battery remaining would be around 85- 90% (at approximately the same amount of usage as today).
I have read this was an issue with early unofficial builds. Is this an isolated issue? Or is this what we're stuck with?
First post. Thanks for reading.

I've had this issue too, but my situation was even worse. I was on airplane mode, Google Now wasn't turned on, and I lost 30% of battery just by using the screen for an 1 hour and a half, not even for games but just simple apps! (considering i was on airplane mode the whole day pretty much)

I am also losing about 30% per hour with screen on with simple usage

Check my thread in the General section, but Sprint enabled Connections Optimizer again with this update, I've found it to be the biggest battery drainer of all. Go in and disable it and see if your battery life is better.

Where is that setting?

cmyasika1 said:
Where is that setting?
Click to expand...
Click to collapse
Settings, more settings, mobile networks, connection optimizer.
Or, if you have Titanium Backup, you can just freeze the Sprint Optimizer app. That's what I did.

Regarding the Awake length when checking the battery

Hey guys. So, I'm currently using a stock rom for the XS w/ SSKernel v7 on it. I usually run my phone in OnDemand governor w/ 1.62ghz up and 138mhz (thru SystemTuner). When my phone is on standby for like 7-8 hours, 5-10% of my battery gets eaten up. And when I check the battery consumption (thru Settings ->Battery ->Battery Graph illustration), the phone is usually awake for like 75-90% of the time. How is this possible and are there any ways on lowering this down so that I could save more battery during standby?? Hope you guys could help me out with this Thanks..
P.S. WiFi, BT, Data Access(Mobile Internet) are off. Only the network carrier sim is on.

Can you provide a screenshot
Like this
Sent from my Xperia S using xda premium

I just charged my phone again But your awake length isn't that much. How did you do it? I tried switching to KA19 rom. Still testing it out though.

First, ur settings are not optimal.
Second, dont trust ur battery. Use betterbatterystats to look for wakelocks and something like that.

Here's my screenshot. Apparently, that 7 hours is like standby coz I was sleeping at that time. You could see that it's been awake for a heck of a time and it's just so annoying to see that. What should I do??
Battery was from 82%-76% when I left it at standby mode.

An app to show idle % per hour battery drain?

Hi, I have a OnePlus 3 with LineageOS, I also used to have the ElementalX kernel on which I enabled the battery monitor and I could see the battery drain percentage/hour in real time, at first it was 1,5%/h idling which is already terrible (for ref i used my schoolmates nexus, which had 0,5%/h and also googled a bit) but then it got worse and worse until it got to 3%/h so I decided to clean flash the rom and leave the stock kernel on... And that has left me with awful OCD about my battery since I can't see the drain in real time anymore (Previously I used the EX Kernel Manager which works only with that kernel)
So I need to know 2 things, does anyone know why my battery drain could have been acting out? And more importantly, please recommend me some apps that can display the idle battery drain in real time...
Thanks in advance.

Ex kernel mangaer works with all kernels. You could use accubattery as well, it does have a similar option too. Idle drain needs to be checked on long runs, for example if you use your phone for texting and turn your screen on/off many times, a battery monitor app could not be that accurate because when it scales the percentage used by screen off it could register the amount of power used by the screen when it was on ( but it wasn't register as screen on because the 1% dropped when the screen was off even if you used that 1% when the screen was on). I hope it's clear enough. English is not my native language and it's hard to explain it.

30 minutes SOT, what could be draining my battery?

I'm having battery issues. I am normally getting 2 hours SOT maximum, which reduced to 1h30 over time. I did a factory reset (still on stock android) and flashed ElementalX kernel to downclock the cpu/gpu, to hopefully save some juice, but it didn't change much. It looks like my phone is never going to sleep or doze and is depleting battery at a steady rate while not in use.
Here is a screenshot album: imgur.com/a/dezhr

Some **** won't let phone enter Doze, you can see Awake (screen off) line in Better Battery Stats. It means, that although screen is off, phone is still fully awake - probably an app syncing in background.
IMHO it's Google Play, not sure though. Try reflashing current ROM build and newer GApps, while keeping all data.

It looks like it was Facebook Messenger that was running constantly in the background.. Once I killed the app, the power stopped dropping. Also it seems that turning off the wifi helped a bit too (since there was no wifi available).