6 Hours Battery? - Nexus 7 Q&A, Help & Troubleshooting

6 hours Battery life is the maximum i get in my rooted stock rom Nexus 7....
Sent from my Nexus 7 using xda premium

6 hours doing what? If you use it non-stop for 6 hours (screen always on) then that's probably about right.
I get about 3 days use from mine (which has about 6 hours screen on time by the end of it).
Remember as well the warmer it gets the faster the battery will drop, plus turning it on and off a lot will take a lot out the battery, leaving it to idle in standby is better than to keep turning it off all the time.
I hope this helps but I cannot be more specific without knowing exactly what your doing with yours.

Can you post more detail. Like what you do with it during that 6 hours. do you have everything on like.
Things that you should check and lower to help with battery life
1 . screen brightness (put as low as you can handle)
2. Wifi on all the time when there is NO NETWORK CONNECTION.
3. sync accounts in background (sns notifications and running apps) ROGUE.
4. GPS AND LOCATION SETTINGS (EAT BATTERY NEARLY MORE THEN ANYTHING)
5. OVER CLOCKING AND TWEAKING SYSYEM
The above is a place to start good luck

erica_renee said:
Can you post more detail. Like what you do with it during that 6 hours. do you have everything on like.
Things that you should check and lower to help with battery life
1 . screen brightness (put as low as you can handle)
2. Wifi on all the time when there is NO NETWORK CONNECTION.
3. sync accounts in background (sns notifications and running apps) ROGUE.
4. GPS AND LOCATION SETTINGS (EAT BATTERY NEARLY MORE THEN ANYTHING)
5. OVER CLOCKING AND TWEAKING SYSYEM
The above is a place to start good luck
Click to expand...
Click to collapse
Saying that I have noticed leaving the wifi and gps on makes no noticeable difference on the nexus 7 (it does on a phone). The biggest drain seems to be leaving NFC turned on all the time, turn it off and you notice a boost straight away.

Less than 6 hours of intensive use everything on is the most i get for intensive usage...
Google promised 10 hours
I want a nuclear powered nexus 7, I want to compete with Nasa, s Mars Curiosity....
Sent from my Nexus 7 using xda premium

wifi on for web use only, max brightness and bluetooth off..I can watch about 6 hours shows and play a game about hour and then turn wifi on check emails and some sites, all in all 6-8 hours depending. Never over 8 tho, but I charge it daily anyways as it seems to charge really fast.

NDUTU said:
Less than 6 hours of intensive use everything on is the most i get for intensive usage...
Google promised 10 hours
I want a nuclear powered nexus 7, I want to compete with Nasa, s Mars Curiosity....
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
Quoted right from https://play.google.com/store/devices/details?id=nexus_7_8gb&feature=single-wide-banner sorry but sounds like your getting near average battery life. I feel as thou i get more then 8 hours continuous use but i never use mine for gaming and never in front of it for long periods..
----------------THIN, LIGHT AND PORTABLE
Nexus 7 is a no compromise Android tablet that’s designed to go wherever you go. With a stunning 7” display, powerful quad-core processor and up to 8 hours of battery life during active use, Nexus 7 was built to bring you the best of Google in a slim, portable package that fits perfectly in your hand.----------------------------------------------
---------- Post added at 01:03 PM ---------- Previous post was at 12:59 PM ----------
Lennyuk said:
Saying that I have noticed leaving the wifi and gps on makes no noticeable difference on the nexus 7 (it does on a phone). The biggest drain seems to be leaving NFC turned on all the time, turn it off and you notice a boost straight away.
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Click to collapse
Thanks for the tip i will turn nfc off as i have only set it up NEVER Used it nor am i sure i ever will.
i was actually quoting on how my a500 and android phone does.Not really used the nexus long enough to get a true feel for battery life . My use is checking email posting to forums and internet searching. once in a while i will use gps. but never long periods of use.. gps on a500 sucks the battery and does not get the greatest signal . but it still gets 8 + hours .

Trinity 7 kernel, use TKT (play store) and UC to 100/1100 and disable offline CPUs at boot. Amazing battery life

Lennyuk said:
Saying that I have noticed leaving the wifi and gps on makes no noticeable difference on the nexus 7 (it does on a phone). The biggest drain seems to be leaving NFC turned on all the time, turn it off and you notice a boost straight away.
Click to expand...
Click to collapse
Sounds like you have a fault somewher. NFC uses very little power.

Harry GT-S5830 said:
Trinity 7 kernel, use TKT (play store) and UC to 100/1100 and disable offline CPUs at boot. Amazing battery life
Click to expand...
Click to collapse
Can I install this is kernel in The Stock Rom?
Sent from my GT-I9300 using xda premium

Yes u can flash it on the stock ROM. Use the above settings and you'll find that the battery doesn't want to come down. Its the best kernel right now. Be sure to support the developer by buying the kernel app also. I got 1hr screen time for 10% battery so that gives you an idea. Also 7000 benchmark.
Sent from my Nexus 7 using xda app-developers app

This thread gave me the idea to re-download SetCPU to underclock it. However, I immediately noticed flaws. Switching between homescreens had become laggy. I uninstalled, and I'll leave it the way it is.

Related

horrific battery life...help?!

Hi All
Once again thanks for watching my video and getting me tickets to MWC...but alas i have another issue. My Note has horrific battery life....practically about 8 hours.
I downloaded better battery stats and there are no major wakelocks going on...(just juice defender at 3.4% which i uninstalled anyway) ....any other ideas?
Any help would be appreciated, another Mobiler suggested i put a custom rom on...I'm just terrified of 'bricking' my phone lol
This is perfectly average battery life for stock rom with moderate to heavy usage but if on light usage you might have some issues. Here is my battery like with heavy use.
Don't pay attention to people claiming Days of battery life they are simply not using the phone.
Sent from my GT-N7000 using xda premium
Battery life is certainly better than that on my old HTC Desire HD. Far better.
Sent from my GT-N7000 using XDA App
Staceymobiler said:
Hi All
Once again thanks for watching my video and getting me tickets to MWC...but alas i have another issue. My Note has horrific battery life....practically about 8 hours.
I downloaded better battery stats and there are no major wakelocks going on...(just juice defender at 3.4% which i uninstalled anyway) ....any other ideas?
Any help would be appreciated, another Mobiler suggested i put a custom rom on...I'm just terrified of 'bricking' my phone lol
Click to expand...
Click to collapse
Maybe you could post up your betterybatterystats results?
I was having the same problem. I have a lot of apps on my phone, and it was just draining while sleeping as far as I could see. My main issue was all the unwanted apps like the social and media hub popping up whenever they felt like chomping on my battery.
I finally gave in and rooted, and installed droidwall to prevent anything getting network access I do not allow, android assistant for its start up manager, and autorun to delete all 'event listeners' that cause apps to pop up when they like (and there are hundreds of these in the stock apps, I assure you).
I now have 50% more battery life, and it seems to lose a lot less while sleeping.
I installed the CPU speed set thingy (sorry, I forget the name) but I had the problem a few others seem to have because it drained the battery faster than ever while sleeping. I will try again after a few days. I screenshot the battery graph in full screen, showing the WiFi, wake & screen, every day so that I can get a good feel for historical usage and battery life.
I have an el cheapo battery (had two but lost one) for emergencies. I am buying a Samsung one instead (for a 'real' 2500 mAh), and expect to keep it on me at all times. That should take me through a day of pretty heavy usage. I also have some dangly 'add-on' chargers, but frankly a spare battery is neater, smaller and easier.
I have also bout a tablet (10.2" with 16GB) for $200. I fully expect to buy another - one for work and one for home. These will reduce my usage of the G-Note and leave it for actual use as a phone. The main problem is that I use it so damned much! I have my phone, contacts, all my To Do lists, email, audible books, textual books, surfing, games, etc all on one device. I also use it to type notes at meetings or the like using my folding BT keyboard. It does it all really well, but does not have the battery to cope!
I know there are fat batteries out there, but I do not want to spoil the beauty of my svelte Note by giving it a hunch-back!
---------- Post added at 10:42 PM ---------- Previous post was at 10:33 PM ----------
I also use Llama to control things like BT, WiFi and network data access when away from home or office. It does help, and means I don't have to remember to toggle. I tried Juice Defender as well, but its idea of turning on the WiFi at intervals saved my battery but seemed to make my email (IMAP) never download. I need to know when emails come in so that did not work for me. I may try it again at some point and try to make it work better for me.
Uninstall Juice Defender. I found my phone battery lasted twice longer after I removed it.
Sent from my GT-N7000 using Tapatalk
Hi staceymobiler
Root n install the charks rom... woth v3.3 kernel
I vet past one day on single charge n its freakin awsome......
Sent from my GT-N7000 using xda premium
I use my phone for note taking all day and into the evening! Screen and internet used for over 12 hours, constant use! (Screen on lowest setting)
After battery "settled" I get around 10 hours then pop in a second battery!
Took about 15 charging cycles though to get the 10 hours!
Anyway just saying it may take time! And a second battery is always safest
Sent from my GT-N7000 using XDA App
that's... actually pretty normal battery usage if you're using your phone a lot.
my note is operating pretty much 18hours a day. A full charge is all i need, and by the end of the day, i get the critical battery notification.
if your note lasted more than a day, that's great. But with the amount of workload i am expending using my note, i wouldn't be surprised if continued usage of the phone would only last 7 to 8 hours tops. or much less.
and besides, the note can last for more than 2 days, if you didn't use it at all.
thanks for all the suggestions...i'm going to give rooting it a go this evening. Will let you know how that goes.
awesome-member said:
This is perfectly average battery life for stock rom with moderate to heavy usage but if on light usage you might have some issues. Here is my battery like with heavy use.
Don't pay attention to people claiming Days of battery life they are simply not using the phone.
Sent from my GT-N7000 using xda premium
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Click to collapse
Yeap, that seems like average battery life. If you notice (others) that his screen on time was pretty solid most of the time. That means of the nearly 6 hours on, I'd say about 4.x hours the screen was on. So that's good
I have managed to improve my Galaxy note battery life a LOT by doing the following:
- Disable Wi-Fi when not using it.
- Settings > Accounts and Sync > UN-TICK "Auto-sync".
With auto-sync disabled you have to manually open the relevent app to get the data, but for me, thats what I prefer, and it saves loads of battery life.
Used to be 8 hours or less with the above 2 enabled.
now 16 hours+ with the above 2 disabled !
Installed free version of Juice Defender 3 days ago, didn't do anything just keeping it on balanced mod and from now on I have extended normal battery life (phone, e-mails, sms, occasional internet through 3G) from 1 day to 2 days. What can I say ...
It works. When you switch into wifi, gaming or intensive document editing then nothing is going to save you, but just for having the phone in your pocket and using it as a "phone" Juice Defender delivers.
I noticed on the market that roughly half people say it is excellent and the other half is whining that it just sucks. Give it a try a decide for yourself.
Just turn auto sync off and untick "Use wireless networks" and you will be blown away by the battery life.
The last two days my battery was losing power too quickly compared to my previous weeks with my note.
So I thought it must be an app which I installed which is causing this. The only app I installed recently was Google + so it took it off and hey presto - battery life back to normal again.
You might say well it doesn't drain my battery with google+ installed but it works with mine as I tried re-installing again and it sapped the battery again.
Maybe different apps effect different roms, kernals etc...just a thought and something you could try with a recently installed app.
Staceymobiler said:
thanks for all the suggestions...i'm going to give rooting it a go this evening. Will let you know how that goes.
Click to expand...
Click to collapse
Hur, hur!
(sorry, that has different connotations downunder....)
---------- Post added at 02:54 AM ---------- Previous post was at 02:43 AM ----------
nickpimenta said:
I have managed to improve my Galaxy note battery life a LOT by doing the following:
- Disable Wi-Fi when not using it.
- Settings > Accounts and Sync > UN-TICK "Auto-sync".
With auto-sync disabled you have to manually open the relevent app to get the data, but for me, thats what I prefer, and it saves loads of battery life.
Used to be 8 hours or less with the above 2 enabled.
now 16 hours+ with the above 2 disabled !
Click to expand...
Click to collapse
uncommonaman said:
Just turn auto sync off and untick "Use wireless networks" and you will be blown away by the battery life.
Click to expand...
Click to collapse
I can see that as an option, and I believe that all of those who report great battery life are doing much the same. My problem is that I want to be kept alerted to emails. I have tried Juice Defender, as it starts up wireless at defined intervals, but since my email is checking at other defined intervals, at appears that the email never gets through. I have to assume they never coincide.
I also like certain apps to sync, although I guess I could do that manually. Currently I turn on autosync while at home or work with Llama. Luckily the wireless and autosync toggles are in the notification dropdown as well - that is a wonderful idea.
I use the Note far too much, so (as I have probably said) I am getting a tablet. I hope that it will serve as my email notification when I am at home or work. When Llama knows I am at neither place, it can disable autosync and enable mobile data for me (which I keep off at home & work).
It is a delicate balance trying to get full desired operation and decent battery life. I am not sure it is really worth all the agro. I may just settle for a spare battery in my wallet and a dock/battery charger by my bedside. That is probably the easiest of all options! Then I can game away whenever I like without constantly checking the battery
Im using a custom rom rocket rom v21 with abyss kernel... which gives me a battery for 40 hours approx. With fair amount of usage. Sync off facebook app as it sucks a lot of battery too.
Sent from my GT-N7000 using xda premium
In wifi settings enable the option to turn wifi of if the screen is off. That adds a lot of battery time. I get far more than 8 hours and i use it all the time with wifi etc.
Sent from my superior GT-N7000 using Tapatalk
Zamboney said:
In wifi settings enable the option to turn wifi of if the screen is off. That adds a lot of battery time. I get far more than 8 hours and i use it all the time with wifi etc.
Sent from my superior GT-N7000 using Tapatalk
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Click to collapse
Awesome! Been looking for this feature for awhile now. Only downfall is just remembering to switch it back when i'm using Pandora
A bit off topic but I experienced a fluke on my battery life, was just watching simpsons while I had my wifi connected and only had my yahoo messenger connected probably a total of 10-15 messages in 4hrs range, for 4 hours of screen time it normally drains 50-51% only.
I almost always have the same scenario when I watch simpsons on my phone, yahoo messenger running but it the first time to drain it like this.

Did anyone manage to have 40hrs++ battery lifetime?

Dear People,
I am posting this out of big ENVY from my friend's story of his iPh*** 4 battery life with 40hrs ++ of usage (social network on, moderate usage, data always on, bla bla bla) and he still got 20% left of his battery!!!
I was just wondering did anyone managed to experience 40hrs ++ of battery lifetime? My best achievement with my nexus s battery life is
1 day 3 hrs with
MIUI Rom JB 2.8.17
Marmite Kernel 4.3
SmartassV2/deadline
100/1000
Automatic brightness on
Could we EVER achieved 40hrs ++ battery lifetime??? Since Iph*** 4 has practically same specs with Nexus S
It has 1Ghz procs, 512mb ram, 1500mah battery, bla bla bla
Any comments?
A very big advantage of the iphone is the very dim (to my opinion) screen backlight. If you change that to default 1 min instead of 20 on a custom rom, and then change your auto brightness values as well to lower ones your lifetime should increase alot. At least mine does. Also I use Llama to close mobile data after 5 minutes of sleep and then instantly turn it on on unlock. Anyway..we will never be able to win versus apple at some things. They have one operating system made for one device. We got one operating system for like..1 milion devices? That's the same story of console vs pc games.
andrei.voinea93 said:
A very big advantage of the iphone is the very dim (to my opinion) screen backlight. If you change that to default 1 min instead of 20 on a custom rom, and then change your auto brightness values as well to lower ones your lifetime should increase alot. At least mine does. Also I use Llama to close mobile data after 5 minutes of sleep and then instantly turn it on on unlock. Anyway..we will never be able to win versus apple at some things. They have one operating system made for one device. We got one operating system for like..1 milion devices? That's the same story of console vs pc games.
Click to expand...
Click to collapse
Never used iOS devices before...So they have those kind of things hey..
I agree with you with the point that their OS was made for one device, while us is for millions
Thanks for the comment
I've been getting pretty excellent battery life lately, will put up a screen shot but got almost 52hrs battery life with wifi and 3g on until it got to about 15% with about 2h 24m screen on time, although this was pretty light usage to be fair.
Using codename 3.3.2 with standard kernal, I turned NFC off and this seemed to help massively although I've also heard the new Maps app has solved some battery drain so not sure which has contributed the most.
cptblubear said:
I've been getting pretty excellent battery life lately, will put up a screen shot but got almost 52hrs battery life with wifi and 3g on until it got to about 15% with about 2h 24m screen on time, although this was pretty light usage to be fair.
Using codename 3.3.2 with standard kernal, I turned NFC off and this seemed to help massively although I've also heard the new Maps app has solved some battery drain so not sure which has contributed the most.
Click to expand...
Click to collapse
52hrs?????? Cant wait for your screenshots man!
You may think the specs are the same, but the hw in the iPhone and power management is still superior. They get a push notification, even while the 3g radio is in idle and almost off (in which it saves more power). It's hard for Android to optimize the power management specially because of that many hardware variations, it's not only the CPU that counts.
madd0g said:
You may think the specs are the same, but the hw in the iPhone and power management is still superior. They get a push notification, even while the 3g radio is in idle and almost off (in which it saves more power). It's hard for Android to optimize the power management specially because of that many hardware variations, it's not only the CPU that counts.
Click to expand...
Click to collapse
Well, thats good to know, but since its the software differences (meaning coding and stuff), surely (i assume and hope) that we could also applied it (somehow) in our devices through tweaks, can we?
IMHO not much is possible since this is older hardware already and a question for how long will Google bother with it. It might be alot of work needed and you gain some insignificant amount of savings.
Would be nice to see some kind of power management tweaks in coming version of Android though.
well its halfly because android works differently and half way because of the hardware.
yes, the hardware is similar, but the nexus screen takes up more power, the processor is not very efficient, and nfc takes up power... also, the 3g radios are honestly HORRIBLE on the nexus s and that might have something to do with it.
but, the software side does make a major impact. iPhones do not multitask like android, which saves power on slower devices like the iphone 4. thats only half of it though, for instance, the iphone 4S has much worse battery life than the nexus s (by far). ROMs make a big difference also, I am very picky when choosing a ROM- if it doesnt have great battery life then I immediately replace it by another ROM that does.
I get on average about 16-20hours pretty consistantly if you are wondering, and I am OK with that as long as it makes it to the end of the day... I wake at 3:30 and normally it does. My advice is to experiment with different ROMs, I would suggest some, but I use an S 4G...
I don't really believe it. My friend has an iPhone and he uses it quit a bit and seems to have to keep it plugged in as much as I keep my phone. I think he said he usually gets about 8 hrs out of it. And the screen is pretty dull compared to mine so that might make a difference to
Sent from my Nexus S 4G using xda app-developers app
The iPhone screen is a lot smaller too and that's a big tradeoff.
I always get a chuckle at the iHerd people I see on the bus holding their tiny screen 6 inches in front of their face so they can read it.
If battery life is really a concern get a couple of spare batteries and a charger.
Sent from my Crespo using xda premium
heccubusxda said:
The iPhone screen is a lot smaller too and that's a big tradeoff.
I always get a chuckle at the iHerd people I see on the bus holding their tiny screen 6 inches in front of their face so they can read it.
If battery life is really a concern get a couple of spare batteries and a charger.
Sent from my Crespo using xda premium
Click to expand...
Click to collapse
Or an extended battery...
Sent from my Nexus S 4G using xda app-developers app
heccubusxda said:
The iPhone screen is a lot smaller too and that's a big tradeoff.
I always get a chuckle at the iHerd people I see on the bus holding their tiny screen 6 inches in front of their face so they can read it.
If battery life is really a concern get a couple of spare batteries and a charger.
Sent from my Crespo using xda premium
Click to expand...
Click to collapse
Thats a good point too, smaller screen
Use this as yours to shut him up apples wack i got this oc to 1400 on stock with air kernel 186
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nucleor1989 said:
Use this as yours to shut him up apples wack i got this oc to 1400 on stock with air kernel 186
Sent from my Nexus S using xda premium
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Click to collapse
Whoaaaah! What rom and settings? Awesome!
Sent from my SGH-T959V using xda app-developers app
Data was on all the time ? Ive got 33 hrs once but this is insane
I have achieved 50 hours on cna ... yes codename android but dang I forgot to take a screenshot of it I didn't have data on that time though
Sent from my Nexus S using xda premium
Lasting 40+ hours is easy if you don't use the phone much...
The screenshot was taken on a long weekend a while ago. I was busy during the weekend and didn't use my phone much apart from listening to music for no more than 2 hours.
Si_NZ said:
Lasting 40+ hours is easy if you don't use the phone much...
The screenshot was taken on a long weekend a while ago. I was busy during the weekend and didn't use my phone much apart from listening to music for no more than 2 hours.
Click to expand...
Click to collapse
Thats true, but from the iphone their data was on all the time, mid moderate usage.
But, just like some people said, power managwment chip, the os, makes big differences
Sent from my SGH-T959V using xda app-developers app

How to get epic battery life?

Hey guys,
I see some people here have AMAZING battery life. Some people are getting 4+ hours screen on time with a single charge.
I only get around 2 - 2.5 hours screen on time. Which is good, but not as good as other people.
I am using the latest Paranoid Android ROM, and I have tried many different kernels but battery life is the same with all of them. I tried undervolting, still the same battery life.
All location/gps settings are OFF. The only syncing I have is Facebook syncing every 4 hours. I checked the battery stats, and everything is normal. I checked Better Battery Stats and everything is normal too, no unusual wakelocks or anything like that.
I checked my cpu bin in terminal, and it has been binned as a 'FASTER' cpu.
I have very good signal all the time. Always use WiFi, never mobile data. Bluetooth, NFC are OFF, and brightness is autobrightness.
So after all this, why am I not getting amazing battery life like others?
Thank you!
harro3 said:
Hey guys,
I see some people here have AMAZING battery life. Some people are getting 4+ hours screen on time with a single charge.
I only get around 2 - 2.5 hours screen on time. Which is good, but not as good as other people.
I am using the latest Paranoid Android ROM, and I have tried many different kernels but battery life is the same with all of them. I tried undervolting, still the same battery life.
All location/gps settings are OFF. The only syncing I have is Facebook syncing every 4 hours. I checked the battery stats, and everything is normal. I checked Better Battery Stats and everything is normal too, no unusual wakelocks or anything like that.
I checked my cpu bin in terminal, and it has been binned as a 'FASTER' cpu.
I have very good signal all the time. Always use WiFi, never mobile data. Bluetooth, NFC are OFF, and brightness is autobrightness.
So after all this, why am I not getting amazing battery life like others?
Thank you!
Click to expand...
Click to collapse
Because you use the phone and the others no! I have similar battery life. I get 3 hours screen on time.
Try cyanogenmod. For me is the best rom.
Heres a few things that help me:
make sure if your on a ROM that has it to disable cell broadcasts in wireless & network settings.
In Google sync settings, uncheck everything you don't use or can manually sync. The only things I leave checked are gmail, contacts & calendar.
If you've opened maps, make sure to back all the way out of it & swipe it away from your recent tasks screen. Better yet, if you don't need it, uninstall it or use an alternative like mapquest app.
If you don't use Google talk, open it and sign out or uninstall it.
Try not to overdo it with widgets on your home screens. I mean a few is cool, but when u have 5 screens all jam packed with various widgets constantly running & syncing...
I know you said you've tried various kernels, but I honestly found that I got the best screen on time with Franco r86 kernel (just over 4hrs). I'm not a huge kernel fan so I haven't really tried others, but I was only getting just over 3 hrs on stock.
Sent from my Nexus 4 using xda app-developers app
harro3 said:
Hey guys,
I see some people here have AMAZING battery life. Some people are getting 4+ hours screen on time with a single charge.
I only get around 2 - 2.5 hours screen on time. Which is good, but not as good as other people.
I am using the latest Paranoid Android ROM, and I have tried many different kernels but battery life is the same with all of them. I tried undervolting, still the same battery life.
All location/gps settings are OFF. The only syncing I have is Facebook syncing every 4 hours. I checked the battery stats, and everything is normal. I checked Better Battery Stats and everything is normal too, no unusual wakelocks or anything like that.
I checked my cpu bin in terminal, and it has been binned as a 'FASTER' cpu.
I have very good signal all the time. Always use WiFi, never mobile data. Bluetooth, NFC are OFF, and brightness is autobrightness.
So after all this, why am I not getting amazing battery life like others?
Thank you!
Click to expand...
Click to collapse
I use the greenify app to hibernate facebook and words with friends it helps somewhat on battery life
I recently discovered that if I reduce the brightness down to 50% (which is still very BRIGHT), I can get an extra 30% battery life.
Simple, and yet, effective
Turn the brightness down - even 10pct is plenty bright indoors.
Sent from my Nexus 4 using xda app-developers app
Flash matrix kernel
Sent from my 3rd Nexus 4 using Tapatalk 2
lowrider262 said:
Heres a few things that help me:
make sure if your on a ROM that has it to disable cell broadcasts in wireless & network settings.
In Google sync settings, uncheck everything you don't use or can manually sync. The only things I leave checked are gmail, contacts & calendar.
If you've opened maps, make sure to back all the way out of it & swipe it away from your recent tasks screen. Better yet, if you don't need it, uninstall it or use an alternative like mapquest app.
If you don't use Google talk, open it and sign out or uninstall it.
Try not to overdo it with widgets on your home screens. I mean a few is cool, but when u have 5 screens all jam packed with various widgets constantly running & syncing...
I know you said you've tried various kernels, but I honestly found that I got the best screen on time with Franco r86 kernel (just over 4hrs). I'm not a huge kernel fan so I haven't really tried others, but I was only getting just over 3 hrs on stock.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Thanks, I have now signed out of google talk. I only have one widget at the moment and that's the clock widget. It's annoying that everyone can get 3 or 4 hours screen on time and I only get 2
harro3 said:
Hey guys,
I see some people here have AMAZING battery life. Some people are getting 4+ hours screen on time with a single charge.
I only get around 2 - 2.5 hours screen on time. Which is good, but not as good as other people.
I am using the latest Paranoid Android ROM, and I have tried many different kernels but battery life is the same with all of them. I tried undervolting, still the same battery life.
All location/gps settings are OFF. The only syncing I have is Facebook syncing every 4 hours. I checked the battery stats, and everything is normal. I checked Better Battery Stats and everything is normal too, no unusual wakelocks or anything like that.
I checked my cpu bin in terminal, and it has been binned as a 'FASTER' cpu.
I have very good signal all the time. Always use WiFi, never mobile data. Bluetooth, NFC are OFF, and brightness is autobrightness.
So after all this, why am I not getting amazing battery life like others?
Thank you!
Click to expand...
Click to collapse
Try Eugene's CPU Sleeper from the market. It turns off all but one of your cores while the screen is off to minimize cpu usage. On CM nightly with stock kernel I got 34 hours with 17% remaining and 2.5 hours screen on time til I ended up charging my phone. I run my CPU at 1350 max / 384 min.
Make sure under sound settings all the sound on touch, keypad, etc are all turned off. Each time your phone ticks a sound it uses battery. Also bright display backgrounds will use more battery.
I only sync chrome, calendar and instant upload
good luck
harro3 said:
Hey guys,
I see some people here have AMAZING battery life. Some people are getting 4+ hours screen on time with a single charge.
I only get around 2 - 2.5 hours screen on time. Which is good, but not as good as other people.
I am using the latest Paranoid Android ROM, and I have tried many different kernels but battery life is the same with all of them. I tried undervolting, still the same battery life.
All location/gps settings are OFF. The only syncing I have is Facebook syncing every 4 hours. I checked the battery stats, and everything is normal. I checked Better Battery Stats and everything is normal too, no unusual wakelocks or anything like that.
I checked my cpu bin in terminal, and it has been binned as a 'FASTER' cpu.
I have very good signal all the time. Always use WiFi, never mobile data. Bluetooth, NFC are OFF, and brightness is autobrightness.
So after all this, why am I not getting amazing battery life like others?
Thank you!
Click to expand...
Click to collapse
Clock down your device
Use conservative cpu governor or something like that,
Undervolt if necessary
Have a low brightness screen if it's possible
Sent from my Nexus 4
Flash Franco's kernel.
http://forum.xda-developers.com/showthread.php?t=2002782
Sent from my Nexus 4 using xda premium
You can also try this, it takes a few days to "learn" your routine then it supposedly starts saving battery. I'm currently in day 2 of learning mode so I don't know for sure how well it works. But it seems to be getting good reviews so far...
https://play.google.com/store/apps/details?id=com.xiam.snapdragon.app
Sent from my Nexus 4 using xda app-developers app
lowrider262 said:
You can also try this, it takes a few days to "learn" your routine then it supposedly starts saving battery. I'm currently in day 2 of learning mode so I don't know for sure how well it works. But it seems to be getting good reviews so far...
https://play.google.com/store/apps/details?id=com.xiam.snapdragon.app
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
I've read the the battery guru app does nothing for your phone whatsoever...
mrjoeltan said:
I've read the the battery guru app does nothing for your phone whatsoever...
Click to expand...
Click to collapse
It just turns radios off and shuts down syncing, nothing you can't do by yourself.
Sent from my Nexus 4 using xda app-developers app
mrjoeltan said:
I've read the the battery guru app does nothing for your phone whatsoever...
Click to expand...
Click to collapse
Well it basically learns your routines and changes your sync settings, turns WiFi on/off when needed, and various other things you could do yourself but might forget. Kinda like tasker for lazy people so in theory yes it could save you some battery.
Sent from my Nexus 4 using xda app-developers app
VoiD_Dweller said:
Try Eugene's CPU Sleeper from the market. It turns off all but one of your cores while the screen is off to minimize cpu usage. On CM nightly with stock kernel I got 34 hours with 17% remaining and 2.5 hours screen on time til I ended up charging my phone. I run my CPU at 1350 max / 384 min.
Make sure under sound settings all the sound on touch, keypad, etc are all turned off. Each time your phone ticks a sound it uses battery. Also bright display backgrounds will use more battery.
I only sync chrome, calendar and instant upload
good luck
Click to expand...
Click to collapse
All those sounds are already off, that's the first thing I do
Thanks for that app, I'll try it to see if it helps.
curtzxion said:
Clock down your device
Use conservative cpu governor or something like that,
Undervolt if necessary
Have a low brightness screen if it's possible
Sent from my Nexus 4
Click to expand...
Click to collapse
I undervolted the hell out of my phone, at one time it was a -150mv undervolt.
Brightness was on auto, I've now switched to controlling it manually to see if that helps
gravitysandwich said:
Flash Franco's kernel.
http://forum.xda-developers.com/showthread.php?t=2002782
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Tried his kernel already a few weeks ago. No real change in battery.
That seems weird
I am completely stock, and set things more or less the same with you (not syncing, no gps unless needed, on wifi all the time) and I could get over 4 hours screen on time on an 18 hours battery life. I believe this phone (chipset?) is really efficient on standby. Does your phone show that it's being kept awake much using the cpu spy app?
Same here... I'm on stock and the best i got was pretty impressive i think. 49 hours with 4 hours screen on time. I waited till the phone turned off by itself Even though i don't get that with heavier use, it's still enough to take me through a whole day which is better then my old phone
My battery saving tips:
-turn off everything you're not using (wi-fi when not at home or office/school, bluetooth, gps, low brightness indoors)
-swype away apps after you exit from them
-turn off the screen when you put it down/in your pocket etc.
-turn off google now
That is everything that i do. No sync disabling, undervolting, underclocking or other tricks
Install greenify app from playstore
Sent from my Nexus 4 using XDA Premium HD app
drbrainsol said:
My battery saving tips:
-swype away apps after you exit from them
Click to expand...
Click to collapse
That doesn't do anything. Android as a native app killer. On the other side, this would lead to more battery consumption as Android would have to initalize data the next time you open that app. IMHO leave the apps as they are, Android would take care of them and kill them when required.
lowrider262 said:
Kinda like tasker for lazy people so in theory yes it could save you some battery.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
IMO it's isn't as powerful as tasker, but it's giving some extra juice.

Can someone help explain why my battery drains so fast

My SoT is 20 mins, media server has been running for 30 mins.
I have 3G, BT, WiFi , GPS and Google now on all the time. My S3 is able to get a constant 24 hours with the same use.
It seems that the nexus 4 idles OK, but plummets when anything is being used.
I'm using stock ROM, rooted with Franco kernel M1.
I've tried using better battery stats but it keeps resetting every time I open it, making it kinda useless.
Anyone have any idea why the media server uses so much or why its draining so quick?
Thanks
spoonboy said:
My SoT is 20 mins, media server has been running for 30 mins.
I have 3G, BT, WiFi , GPS and Google now on all the time. My S3 is able to get a constant 24 hours with the same use.
It seems that the nexus 4 idles OK, but plummets when anything is being used.
I'm using stock ROM, rooted with Franco kernel M1.
I've tried using better battery stats but it keeps resetting every time I open it, making it kinda useless.
Anyone have any idea why the media server uses so much or why its draining so quick?
Thanks
Click to expand...
Click to collapse
Having all those settings turned on will eat your battery. Are you using BT and GPS during this usage? If not, turn them off. Also regarding mediaserver, SoundCloud or other music streaming apps will engage mediaserver. When your done using said apps kill them from recents menu. Alternatively, you're rooted. I suggest you look into Greenify in the app store. you can select the apps to hibernate when not in use, it requires root.
Regarding BBS, look in settings, you may have something set up within the app thats making it reset.
Given that the battery is the same size as the s3, shouldn't it be able to keep up with it?
If I have to keep turning things off, it defeats the object for me.
I can't imagine the exynos being that much better. Like I said, an easy 24 hours with the s3 under the same usage with all the same things on.
Sent from my Nexus 4 using xda premium
You were listening to music via soundcloud so thats why media server is so high. Plus, you have GPS, Bluetooth and Google now enabled all the time! You answered your own question on why it's draining so fast.
If you don't need the services all the time, disable them until you need it.
It's the same as if you're wondering why your gas bill is so high when you leave the thermostat on at above 70 degrees Fahrenheit all winter long.
Sent from my Nexus 4 using Tapatalk 2
Thanks for the replies.
I do not understand why my s3 can do this without using half as much. Is it really that much better than a stock Google phone with the same size battery??
I use same soundcloud usage on my s3 every single morning on the commute and its usually at 89/90%. I'm ending up with 75 on the nexus 4.
If the nexus 4 battery life is rubbish, that's fine. I'm just looking for confirmation its not broken, which it appears not to be. I knew the S3 was better with battery, just wasn't expecting not being able to get through a day with the nexus 4.
Ive seen lots of pics of ridiculous SoT time, but I guess they must turn everything off.
Sent from my Nexus 4 using xda premium
Are you on 4.2.2? And how long have you had the phone?
Sent from my Nexus 4 using xda app-developers app
Hi. Yep on 4.2.2 and have been using the phone for a week.
Even with WiFi BT and GPS on this phone idles like a champ.
I'm convinced the drain isn't normal, 25 mins of sound cloud uses up more battery than the screen being on for over an hour.... Surely this cannot be right??
Its also worth noting that the phone gets quite hot - which I think is really odd seeing as all its doing is streaming audio.
I've attached some pics to demonstrate what I mean.
I really hope someone can help, I love this phone but if I cant get my normal day out of it on going to have to go back to the s3.
Thanks.
Sent from my Nexus 4 using xda premium
This may not be the phone for you, but here's what I do.
I have toggles (SwitchPro) for Wifi, BT, Data, GPS etc. that I push when I need them. I also have DS Battery Saver which helps shut down said items when screen is not in use.
I'm a Moderate user but I don't think you ever need to have all activities (GPS etc) activated when you are not using that particular activity.
With that being said, you control the battery and screen time. You just need to know how to manage it.
Hope that helps.......
Do you keep large media files on your phone? I've had mediaserver kick my battery's ass on that before if it can't for some reason properly index/understand a media file.
Use betterbatterystats or something equivalent to track your CPU usage and what frequency it's sat at most.

Nexus 4 battery the first week

Hey guys. I'm wondering how much better the battery has gotten since the first week y'all got it, to now.
For me I'm satisfied with the battery and I've had it for 4 days. I get about 2-2.5 hours screen on time with fairly heavy internet usage, texting, etc.
Beerad875 said:
Hey guys. I'm wondering how much better the battery has gotten since the first week y'all got it, to now.
For me I'm satisfied with the battery and I've had it for 4 days. I get about 2-2.5 hours screen on time with fairly heavy internet usage, texting, etc.
Click to expand...
Click to collapse
Are you taking any measures to save battery life, like certain screen brightness, disabling of certain features or radios, undervolting or CPU/Governor changes, etc?
First thing I installed on mine ( haven't had mine a week yet ) was Battery Monitor Widger Pro, since I've used that on my past devices when I was testing out generic batteries (speaking of which the 8$ ebay 3800mAh on my Desire-Z is still kicking strong after a year).
Problem with estimates, is that they are basically just that, and the difference between browsing on mobile vs browsing on wifi or mix, and your reception quality can also have an impact on your battery. (in the end, your screen is the biggest impact).
Mine lately, say if I had it charged at 100% , it'll take about 2 hours on mobile to get to 91%, with the screen being on about 25%-35% of that time (auto-brightness), receive/send text, take out of pocket to check email or facebook notifications, and so forth. Which would normally show as screen 30%, Google services 13%, Wifi 9% (when I had it on between house and destination). Phone idle 8%, Android OS 7% etc.
The widget I mentioned earlier can basically monitor your draw from time to time and if the screen was off or on and such during those times (default interval on it if using a widget is around 10 minutes on the logging, shorter may actually impact the battery it's monitoring oddly enough)
PS: The other day when I actually drained it down to 0% it took about 5-6 hours
Beerad875 said:
Hey guys. I'm wondering how much better the battery has gotten since the first week y'all got it, to now.
For me I'm satisfied with the battery and I've had it for 4 days. I get about 2-2.5 hours screen on time with fairly heavy internet usage, texting, etc.
Click to expand...
Click to collapse
I had about 3-4.5 hours of screen time other moderate to heavy usage on my first week as I was testing it's battery life. As that I just used my phone under light to moderate usage. My brightness level is always at it's lowest but when I'm outside I turn it up to about 50%. I rarely play games on my device. I read a lot on my phone. I use my phone to record lectures in class and do a bit of homework on it. 7 months later and I'm pretty much doing the same. I have a custom kernel installed and I'm really confidence about it. I carry a external battery pack with me all the time but I hardly use. After having a custom kernel for the past 7 months I can say battery life has been relativity the same screen time wise. I learned how to manage my apps so they won't prevent my phone from sleeping to save power. Your mileage will vary depending on what you're doing on your phone and how you manage your device. Cell service is crucial to the phone. If you're in area with little to no service your device will use up more power to stay connected. This is when "Airplane mode" comes in handy.
kbeezie said:
Are you taking any measures to save battery life, like certain screen brightness, disabling of certain features or radios, undervolting or CPU/Governor changes, etc?
First thing I installed on mine ( haven't had mine a week yet ) was Battery Monitor Widger Pro, since I've used that on my past devices when I was testing out generic batteries (speaking of which the 8$ ebay 3800mAh on my Desire-Z is still kicking strong after a year).
Problem with estimates, is that they are basically just that, and the difference between browsing on mobile vs browsing on wifi or mix, and your reception quality can also have an impact on your battery. (in the end, your screen is the biggest impact).
Mine lately, say if I had it charged at 100% , it'll take about 2 hours on mobile to get to 91%, with the screen being on about 25%-35% of that time (auto-brightness), receive/send text, take out of pocket to check email or facebook notifications, and so forth. Which would normally show as screen 30%, Google services 13%, Wifi 9% (when I had it on between house and destination). Phone idle 8%, Android OS 7% etc.
The widget I mentioned earlier can basically monitor your draw from time to time and if the screen was off or on and such during those times (default interval on it if using a widget is around 10 minutes on the logging, shorter may actually impact the battery it's monitoring oddly enough)
PS: The other day when I actually drained it down to 0% it took about 5-6 hours
Click to expand...
Click to collapse
Nah. All stock, not rooted yet, auto-brightness, No auto sync. I don't get very good service at my work and I was about 28% without service during the time I was there. I would get on facebook and message people on facebook and text, surf the internet etc because it was slow. I had maybe 2 hours screen time and 8% battery life when I left work. It was probably 9 hours off the charger. Here. I'll post a screen shot after this post (On my computer right now)
Sent from my Nexus 4 using xda premium
Beerad875 said:
Nah. All stock, not rooted yet, auto-brightness, No auto sync. I don't get very good service at my work and I was about 28% without service during the time I was there. I would get on facebook and message people on facebook and text, surf the internet etc because it was slow. I had maybe 2 hours screen time and 8% battery life when I left work. It was probably 9 hours off the charger. Here. I'll post a screen shot after this post (On my computer right now)
Click to expand...
Click to collapse
One of the benefits to custom roms (though 'stock' on a nexus is well AOSP so...) is the ability to tweak that stuff to finer details, top it off with a custom kernel and can optimize even further. Just a matter of how far you want to take it.
I have a history of immediately rooting anything I get my hands on, so I tend to have very little experience with stock. But the Nexus devices are probably the only ones I could survive having stock (but rooted) as opposed to say touchWhiz on samsung.
I can say that this phone charges FAAAAAAST.
kbeezie said:
One of the benefits to custom roms (though 'stock' on a nexus is well AOSP so...) is the ability to tweak that stuff to finer details, top it off with a custom kernel and can optimize even further. Just a matter of how far you want to take it.
I have a history of immediately rooting anything I get my hands on, so I tend to have very little experience with stock. But the Nexus devices are probably the only ones I could survive having stock (but rooted) as opposed to say touchWhiz on samsung.
Click to expand...
Click to collapse
Coming from the the backflip's motoblur to the Captivate's touchwiz then onto One X's sense to AOSP.. I'm going to stay android purist from now on. I'm in love with AOSP
Beerad875 said:
Coming from the the backflip's motoblur to the Captivate's touchwiz then onto One X's sense to AOSP.. I'm going to stay android purist from now on. I'm in love with AOSP
Click to expand...
Click to collapse
At least all the available kernels work just fine with AOSP. (Francos seems to be pretty popular for battery, I prefer bricked though on both my N4 and N7).
kbeezie said:
At least all the available kernels work just fine with AOSP. (Francos seems to be pretty popular for battery, I prefer bricked though on both my N4 and N7).
Click to expand...
Click to collapse
Why do you prefer them?
So with battery monitor widget pro do I just let it run and collect data?
kbeezie said:
At least all the available kernels work just fine with AOSP. (Francos seems to be pretty popular for battery, I prefer bricked though on both my N4 and N7).
Click to expand...
Click to collapse
Guess tonight I'm going to work on getting it drained down to 0% just remembered it was my N7 that I did a full cycle on with monitoring, I haven't done so yet to the N4.
PS: I usually do a dual-graph (mV and mA), but in this screenshot you can see generally speaking with my current configuration, I tend to drain around 200-300 mA screen on, and around -20-50 with it off.
PS#2 : It only went up to the -400 or so mA on the top right because I had changed my screen brightness to about half instead of autobrightness.
Beerad875 said:
Why do you prefer them?
Click to expand...
Click to collapse
Additional options. Take for example the Bricked kernel for the N4 in my signature. This is it's feature list, it's not aimed for hardcore overclockers or such but gives you some options (The one for the Nexus 7 is a bit more configurable during the installation).
* Based upon Googles msm 3.4 source
* Various other fixes (look @ github)
* Compiled with gcc4.7.2 toolchain (linaro 09.12)
* -O3 optimized
* Snapdragon S4 & CortexA15 optimizations
* Sweep2wake
* 192Mhz min clock
* replaced qcoms hotplug binary with msm_mpdecision (IN-KERNEL, better battery life + performance)
* Extensive sysfs interface for mpdecision with all the tuneables you want (/sys/kernel/msm_mpdecision/)
* replaced the thermald binary with my IN-KERNEL solution. (/sys/kernel/msm_thermal/)
* export krait version to: /sys/kernel/debug/krait_variant
* modified ondemand governor
* Allow OC up to 1,83Ghz, faux123 (from a thermal point of view that is now SAFE)
* Fixed min cpufreq resets
* Undervolting (faux123)
* Default clocks: 384min & 1512max
Click to expand...
Click to collapse
Sweep2Wake is kind of nice too, you just slide accross the screen to turn it on without having to touch the power button (And yes your phone is still asleep doing this, it just works off interupts.)
other kernels can be a bit more involved, such as being aimed towards overclocking the CPU or GPU, or adding in extra features not normally found in stock, and so forth. I've had the best luck with Bricked and Francos'
Beerad875 said:
So with battery monitor widget pro do I just let it run and collect data?
Click to expand...
Click to collapse
Yep, if you have a widget on the home screen (I usually do 2x1 size) it'll collect every 10 mins by default. If you don't use a widget you'd have to check a box in preference to monitor without widget or it won't log times (note for example the missing 'blocks' from my history log).
---------- Post added at 11:29 PM ---------- Previous post was at 11:22 PM ----------
Speaking of battery, anyone ever gotten more than say 800mA charge on their N4? Cuz even on my old Desire-Z if I plugged it into a 2.1A charger it would actually charge up around 1300-1500mA, but with the Nexus 4 seems that even on a 2.1A port it rarely charges more than 500-600mA.
It'll probably become more accurate once I actually drain it down to 0% and have the widget record it's history from 0% to 100% since it bases a lot of it's mA estimates off that (ie: off the rate of decrease of the battery's mv since batteries typically have a certain voltage once they hit near 0% and when they're at 100%, comebine that with what it knows the battery's mA to be it can determine the charge/discharge based off that).
kbeezie said:
[/COLOR]Speaking of battery, anyone ever gotten more than say 800mA charge on their N4? Cuz even on my old Desire-Z if I plugged it into a 2.1A charger it would actually charge up around 1300-1500mA, but with the Nexus 4 seems that even on a 2.1A port it rarely charges more than 500-600mA.
It'll probably become more accurate once I actually drain it down to 0% and have the widget record it's history from 0% to 100% since it bases a lot of it's mA estimates off that (ie: off the rate of decrease of the battery's mv since batteries typically have a certain voltage once they hit near 0% and when they're at 100%, comebine that with what it knows the battery's mA to be it can determine the charge/discharge based off that).
Click to expand...
Click to collapse
I can get back to you when I figure this app out more and start using it.
What'd you say your screen on time usually was?
Beerad875 said:
I can get back to you when I figure this app out more and start using it.
What'd you say your screen on time usually was?
Click to expand...
Click to collapse
Just in the last 2 hours or so, probably 30-45 minutes. I was in the car so it wasn't coming on all that often. Since I actually have the widget on my home screen now, I'll just post an update again probably in the morning as I play with the phone some more, maybe play a game or two (I'll set a Market in the battery history before I start and after I end it).
Far as figuring it out, it's pretty easy since most of it is already set up by default once you open it. You can basically just pop a 2x1 widget on the home screen and just leave it.
My battery life has improved drastically by just sticking with one setup and letting the phone get used to it. That means keep the same rom and kernel so the phone settles in and gets used to it. After a few cycles your usage should increase.
I recommend straight CM 10.1 with Franco kernel.
Also use 2g instead of HSPA+ when you're not using data to save power.
If you're using touch control, don't, it drains more power for sure.
Undervolting helps too.
Sent from my Nexus 4 using xda app-developers app
nyyankees1237 said:
If you're using touch control, don't, it drains more power for sure.
Click to expand...
Click to collapse
Can you clarify on this, other than the power/volume there's not much else to actually control the phone with.
kbeezie said:
Can you clarify on this, other than the power/volume there's not much else to actually control the phone with.
Click to expand...
Click to collapse
The app 'touch control' , many nexus 4 owners use it to wake and lock the phone using touch gestures in place of the traditional power button. In my usage it definitely drains the battery quicker.
Sent from my GT-N5110 using xda app-developers app
nyyankees1237 said:
The app 'touch control' , many nexus 4 owners use it to wake and lock the phone using touch gestures in place of the traditional power button. In my usage it definitely drains the battery quicker.
Sent from my GT-N5110 using xda app-developers app
Click to expand...
Click to collapse
Oh you mean like Sweep2Wake in the Bricked Kernel I'm using, except that doesn't use any battery cuz that's in the kernel using interrupts rather than an app that would keep the phone awake. (course that's all it does too, wake, nothing more sophisticated than that).
But yea I didn't know about that app.
kbeezie said:
Just in the last 2 hours or so, probably 30-45 minutes. I was in the car so it wasn't coming on all that often. Since I actually have the widget on my home screen now, I'll just post an update again probably in the morning as I play with the phone some more, maybe play a game or two (I'll set a Market in the battery history before I start and after I end it).
Far as figuring it out, it's pretty easy since most of it is already set up by default once you open it. You can basically just pop a 2x1 widget on the home screen and just leave it.
Click to expand...
Click to collapse
So yeah. You should drain it then report with some screenshots.
It's at 44% right now
Sent from my Nexus 4 using XDA Premium HD app

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