Database Users

[Q] does the battery suppose to drain even in standby mode?

I am concerned about the battery life of my exchanged tab. The first tab I had has great battery life but had some sound issues that's why I replace it. But now I have this new tab but battery is draing fast even not using heavily. I am charging the tab whole night. I did not even has email account setup so its not retrieving any emails. Any suggestions to improve battery life please?

Is your wifi and GPS running at all times?
If you have rooted the tab try using an overclock tool to reduce the load, this should increase the battery life. Until then we are gonna have to wait for a custom honeycomb ROM that increases battery life. If its as bad as you say it is I would try another tablet and hope you dont get another thats messed up.
GL

No the tablet is not rooted but its factory unlocked. How do I know if the tablet is rooted?

It would only be rooted if you rooted it

Mine barely drains with screen off and Wifi on with everything syncing at the same time.. I can go like 2 days average use on my tab so far.

so it seems like there is an hardware issue. Diversion is your tab unlocked or locked?

Diversion said:
Mine barely drains with screen off and Wifi on with everything syncing at the same time.. I can go like 2 days average use on my tab so far.
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Same here. Too bad it takes forever to charge tho.

dazz87 said:
Same here. Too bad it takes forever to charge tho.
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Forever is an understatement.

I have different battery experience than the OP. I keep my wifi on constantly. On standby with little use (~0.5 hour today), the battery went from 100% to 93% since morning to midnight.

I think it's your unit. I use mine for about a total of 4 to 5 hours a day with wifi and bt at a fixed 75% brightness and when it goes into standby I only lose about 1% every 2 hours. Usually by the end of the day I'm at about 70% battery with a low of 50%.
Sent from my GT-P7510 using XDA Premium App

Switch launchers I'm running adw ex (LPP had a number of fc's that I didn't like).
Sent from my GT-P7510 using XDA Premium App

Have you checked the battery usage to see if any apps are using a lot of battery? (Settings -> About Tablet -> Battery Use)
Mine was at 98% when I went to bed last night and at 94% about 7 hours later this morning. That's with wifi, bluetooth and GPS on, and GMail syncing (but not much else).

all of you guys whose battery has no issue do you guys have tab with locked or unlocked boot-loader. Mine is unlocked and i think because of that battery is discharging fast. Snoopstah i check the settings battery use is screen, browser (which is closed), wifi, android OS thats about it. Please let me know what should i do i have one more day to exchange it.
Thank you all

Exchange it. The battery life in standby mode is stellar. Mine's unlocked too and I lose 2% all night with everything on.

The bootloader on mine is unlocked, and came that way. In either case, that should not affect battery life, though I could imagine how rooting would possibly allow you to install or turn on something that would drain your battery faster (and is left off by default).
Just as an aside, what brightness setting do you guys use on your tabs? Somebody mentioned 75% and that seems super bright to me. I keep my brightness at around 20% or so. Auto brightness is way too dim on this thing. I look forward to some development action on this thing, the ability to customize the auto-brightness levels in CM7 on my Captivate is really awesome.

I have the same battery draining. I can only get 6 hours of straight usage with 20 on brightness. I'll exchange mine today. My zoom can last 8 hours straight of usage

tabing said:
all of you guys whose battery has no issue do you guys have tab with locked or unlocked boot-loader. Mine is unlocked and i think because of that battery is discharging fast.
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I have no battery issue when in stand by mode and my tab is unlocked and the wifi policy is set to stay on. I drain about 3% per 7 hrs which is excellent.

Battery life been sucking...

I don't know if it's my imagination, but since the 2.4.6 update, my battery life has dropped a bit. By the time I get into my office from my morning commute, I'm anywhere in the 65-70% battery life after unplugging from a full charge. I haven't done anything new. I always unplug around 8:30 am when I head out, I do some light chatting with gf, browse some sites, check facebook (usually very briefly), and maybe sometimes do a little reading on my device. By the time I get into the office around 9:30 or 10 AM, I'm usually around the 80-85% area with battery.
Lately, doing the same thing, I'm seeing the aforementioned 65-70%.
Is anyone else experiencing decreased battery life since 2.3.6?
I'm on a Tmobile Nexus S, running stock 2.3.6 (no custom ROMs).

2.4.6 ? .... maybe 2.3.6 ... and yes, I also noticed a slight increase in power consuption after the upgrade. The stand-by is still great .. about 0.8 - 1% per hour.

Sorry, yes I meant 2.3.6.
Thanks for replying Ro_explorer. Is your increased power consumption significant? Seeing 65-70% when I'm used to seeing 80-85% as I get into my office, I find, is a large change. To be frank, the battery life of the Nexus S in general isn't so fantastic to begin with... this hit makes it worse.
Anyone else?

I used to get home with about 40-50% after a whole "normal day" (unplugged at 8AM, and getting back home at ~8PM) .. now (with the same average usage) I'm getting home with ~30-40% ... that why I said "slight increase" ...

Not your imagination, I too have noticed this. I hope the next update, will fix this - as I used to get pretty good battery life (even with over 250 apps).
When I recently updated to the 2.3.6, it caused a bug of continuous reboot (every 1-3 minutes), so I had to do a hard reset - now it works fine, but I only have added back about 15 apps - and the battery life sux!

Downgrade OS' it will be ok.

This is so weird. Why is the battery life worse?

onthecouchagain said:
Sorry, yes I meant 2.3.6.
Thanks for replying Ro_explorer. Is your increased power consumption significant? Seeing 65-70% when I'm used to seeing 80-85% as I get into my office, I find, is a large change. To be frank, the battery life of the Nexus S in general isn't so fantastic to begin with... this hit makes it worse.
Anyone else?
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Click to collapse
You want bad battery life? Try an Evo 4g with a Sense rom. I averaged about 6hrs using a 1500mAh battery, in stock form.
The nexus is pretty light on power consumption, if you ask me. I average 15hrs on the stock 2.3.7 rom/kernel combo, with stock battery.
Sent from my Nexus S 4G using XDA App

I'm on 2.3.6 and need to charge every two days. I text a lot and do light gaming. I'm typing this from my phone. Maybe you could drain the battery and wipe battery stats? I'm not even at 50% yet and I charged yesterday.
Sent from my Nexus S using Tapatalk

I also noticed that the battery last less time
I've been waiting to see if anybody else reporting this issue

i noticed a decent increase in battery life going to 2.3.7 and thought that previously the battery life had been fairly poor :\

I am non rooted, and get around 20 hrs on light to moderate use. Again. Stock, non rooted.

How do I recalibrate my battery? I wonder if it could be that...

There are many was to recalibrate. Some involve wiping batt stats, some plugging and unplugging phone several times after charge.
I have always found that using the battery almost all the way down, but not past 5%, and then full recharge conditions it very well.

Oh I've been here to solve the problem
"Why last 2 weeks my Nexus s drain battery so fast ? or I have to calibrate it"
Thank for your notice about update OS to 2.3.6.
I think that's a root cause for me too.
1. Could I rollback to 2.3.4 ,how?
2. Does battery calibration is useful for this case , how?( someone suggest to calibrate when flashing new rom )
Thank you very much..

i want to know who have some methods to do with this stuff

borrowedchief said:
There are many was to recalibrate. Some involve wiping batt stats, some plugging and unplugging phone several times after charge.
I have always found that using the battery almost all the way down, but not past 5%, and then full recharge conditions it very well.
Click to expand...
Click to collapse
Whenever switching roms, kernels, or batteries, i always perform the following :
1. Charge to a true 100% (Battery Monitor Widget will register +0 to +2 mA)
2. Wipe battery stats using recovery (Amon RA has this option for the Evo, not sure about cwm), Battery Monitor Widget, or a dedicated app.
3. Discharge battery to 0% with normal usage. When the phone shuts down, I pull and re-install the battery and power back up (it will shutdown again very quickly).
4. Recharge battery and be on my merry way.
Sent from my Nexus S 4G using XDA App

I found one workaround solution for this issue on
ww.google.com/support/forum/p/Google+Mobile/thread?tid=1684c50cea15282a&hl=en&fid=1684c50cea15282a0004af022e5ed212
Sproogle77 's solution
Problem solved. Using the OS Monitor app, I found that the main culprit was Google Services - the Contacts sync specifically. Even though I had this disabled (only Gmail was being allowed to sync) it was constantly working, apparently trying to fix a location. The message log showed that it was generating continuous debug messages, all about locations - around 10 of these every second.
I have solved the problem by disabling 'Use wireless networks' under the Locations & Security settings.'Use GPS satellites' is still running. This immediately dropped my CPU usage - which had been running around 30 to 40% even when otherwise idle, to around 10%. Google contacts sync is now using 0% of the CPU. The difference in battery life was pretty much immediate and is now back to what it was before - the change in the slope on the battery usage graph is remarkable!
This doesn't really seem like a solution to me, and I don't know whether other aspects of my functionality are being affected, but at least my phone is properly useable again.
I'm testing for 1 day and I think that's working for me.

onthecouchagain said:
This is so weird. Why is the battery life worse?
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Click to collapse
One reason is that the new version of the stock kernel removed a speed stepping, so it'll power to higher levels faster, thus using more battery.

rentaric said:
One reason is that the new version of the stock kernel removed a speed stepping, so it'll power to higher levels faster, thus using more battery.
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That actually isn't the problem. I'm using netarchy's kernel and still get this problem.
My battery life dropped from 16 hours --> 6 hours. the slope on my battery usage life is horrible the system is also awake almost constantly even when I'm not touching it / getting no messages.
I will try the fix suggested on the google support forum and see if that does the trick. sloppy update.

Nexus 4 Average Battery Life - How many hours you get out of your phone?

Nexus 4 Average Battery Life - How many hours you get out of your phone?
So far getting 13 hours with medium brightness.

Its not the total on time that really counts, it is the screen on time. And go to the great battery impression thread in the general forum!

Just finished getting 1d11hrs from it... I had run it down to 1% and fully meant to take screenshots when the phone shut down on me I had done "average" use as I use a phone... watched a little bit of an hd movie, facebook, a few calls, playing on google play and other stuff.
I'm coming from a Samsung Infuse and this is about on par with the battery life I was getting from that running CM10 unofficial on it when the ROM didn't have drain problems affecting it.
I don't know if this isn't typical of others' experience with the N4... I was cautious and plugged my baby in when I got it before even turning it on and let it charge up. It did have to do some calibration as with power off it thought it was at 100% but when it booted up, it registered 80% charge. Now after a few full drain/charge cycles it seems to have a very good feeling for 100% and 0%.

j.smith said:
Just finished getting 1d11hrs from it... I had run it down to 1% and fully meant to take screenshots when the phone shut down on me I had done "average" use as I use a phone... watched a little bit of an hd movie, facebook, a few calls, playing on google play and other stuff.
I'm coming from a Samsung Infuse and this is about on par with the battery life I was getting from that running CM10 unofficial on it when the ROM didn't have drain problems affecting it.
I don't know if this isn't typical of others' experience with the N4... I was cautious and plugged my baby in when I got it before even turning it on and let it charge up. It did have to do some calibration as with power off it thought it was at 100% but when it booted up, it registered 80% charge. Now after a few full drain/charge cycles it seems to have a very good feeling for 100% and 0%.
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Even though i wasnt able to get my hands on it, my cousin did and he says he got 6 hour on screen time and at total of 22 hours for battery

Where are you getting this battery life? I get max 5 hours of moderate use Facebook twitter tapa talk, a game or two what gives?
Sent from my Nexus 4 using Tapatalk 2

Total battery time it differs but my screen time on average is around 4hrs.
Very low brightness, wifi always on.
I only use a few apps like sms, tweet lanes, instagram, flipboard, and espn.

I get 9 by barely using it. This phone has a serious problem. It's obvious because the Optimus G is a battery boss, and it even has LTE.
This phone had the exact same screen, internals, battery.

I got 5 hour screen time with aokp

dcdttu said:
I get 9 by barely using it. This phone has a serious problem. It's obvious because the Optimus G is a battery boss, and it even has LTE.
This phone had the exact same screen, internals, battery.
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That's where you know it is software related. 4.2 has some bugs, the galaxy nexus got updated to 4.2 and people are reporting really bad battery life ever since the update. Also JB in general doesn't perform as good as ICS in the battery department cause of project butter that cranks the CPU up soon as you start using the phone. Example is Galaxy s 3.
Personally i get very good battery life and in very satisfied. When i was on stock my battery started really bad but then improved, now that I'm rooted and running a custom ROM and kernel i have very satisfying battery life.
Sent from my Mako Nexus quattro using Tapatalk 2

Is my Nexus 10 faulty?

I've had it for around a week now but I've yet to get over 6hrs battery life. I keep the display on the dimmest setting, have no bluetooth or anything on apart from wifi. I keep location services and Google Now off and I use it mainly for Internet browsing, you tube and a couple of bejewelled type games for around 10 mins a day. I haven't watched any films on it or played any real heavy duty cpu smashing games at all.
No matter what I do, I just don't get any more than 6hrs before I get the 15% battery warning.
I don't appear to have any wake locks, the battery graph shows that when the display is off, the tablet never seems to be awake.
I installed Better Battery Stats but I don't really understand what to look for.
Can anyone suggest anything before I give Google a call and they tell me factory reset and try again?
Any help would be greatly appreciated!
Sent from my Nexus 10 using Tapatalk HD

Mind posting a picture of your betterbattery with:
-Partial wake locks since boot
-Other since boot
If you use it like you explained you should be getting more than 6 hours.
I'm using a custom rom and kernel so that might explain why I can idle for an entire day and only lose around 6-8% depending on how many emails I get.
Typically I get around 8 hours of use which includes watching movies over stream, YouTube, flip board, email, xda surfing, and a few other things.
Sent from my Nexus 10

Thanks for the reply, I hope this is what you wanted - I'm not sure exactly how to do add files to posts but here goes..

Anyone please?
Sent from my Nexus 10 using Tapatalk HD

Charge your device to 100% and use your device the way you typically have been. Once you get down to red numbers, post a screen shot of the regular Android system battery usage. That might give a better picture of what's going on.
You can also charge to 100% and disconnect from the charger and let your device idle. Better battery stats is a better tool to use when you aren't using your tablet, and you are experiencing battery drain.
Also, you didn't mention whether you are stock, rooted, or rooted and ROM'ed. Please do that and we can go from there.

cb3ck said:
Charge your device to 100% and use your device the way you typically have been. Once you get down to red numbers, post a screen shot of the regular Android system battery usage. That might give a better picture of what's going on.
You can also charge to 100% and disconnect from the charger and let your device idle. Better battery stats is a better tool to use when you aren't using your tablet, and you are experiencing battery drain.
Also, you didn't mention whether you are stock, rooted, or rooted and ROM'ed. Please do that and we can go from there.
Click to expand...
Click to collapse
Ok, thank you.
Sent from my Nexus 10 using Tapatalk HD

Homey said:
I've had it for around a week now but I've yet to get over 6hrs battery life. I keep the display on the dimmest setting, have no bluetooth or anything on apart from wifi. I keep location services and Google Now off and I use it mainly for Internet browsing, you tube and a couple of bejewelled type games for around 10 mins a day. I haven't watched any films on it or played any real heavy duty cpu smashing games at all.
No matter what I do, I just don't get any more than 6hrs before I get the 15% battery warning.
I don't appear to have any wake locks, the battery graph shows that when the display is off, the tablet never seems to be awake.
I installed Better Battery Stats but I don't really understand what to look for.
Can anyone suggest anything before I give Google a call and they tell me factory reset and try again?
Any help would be greatly appreciated!
Sent from my Nexus 10 using Tapatalk HD
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Click to collapse
This 6 total battery? Or 6hr screen on time time? I get 6hr screen time and I consider that great

SayWhat10 said:
This 6 total battery? Or 6hr screen on time time? I get 6hr screen time and I consider that great
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Screen time. I thought that was kinda low after seeing loads of people get 8 - 9 hrs and some get even more!
Sent from my Nexus 10 using Tapatalk HD

Homey said:
Screen time. I thought that was kinda low after seeing loads of people get 8 - 9 hrs and some get even more!
Sent from my Nexus 10 using Tapatalk HD
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Click to collapse
You said 6 hours battery life in OP, implying you were getting that battery life for the device... ._.
Congrats. You have a normal device... People may be using screen filter to get those results, but why not just enjoy the screen instead of gimping it for an extra hour or two of dimly viewed screen...It's not too tough to charge it overnight.

cb3ck said:
You said 6 hours battery life in OP, implying you were getting that battery life for the device... ._.
Congrats. You have a normal device... People may be using screen filter to get those results, but why not just enjoy the screen instead of gimping it for an extra hour or two of dimly viewed screen...It's not too tough to charge it overnight.
Click to expand...
Click to collapse
And if its really that big an issue, go get KTManta, Franco, or any kernel that lets you reduce the maximum clock from 1.7 to 1.3 or 1.2 GHz. I have benchmarks for the Manta at frequencies ranging from 1.2 to 2.1GHz and there's not a big difference in performance.

Battery Life Worry/Question

My battery life has been pretty good. However, the number one thing consistently using battery is "Android System". Is this normal? Thanks!

Same here. On all my other Android phones Screen is the top user.

U are using ips technology on the screen unlike amold that saamy used which kills the battery in hours in full brightness . As you could see that the iPhone has good batttery life because the 720p ips screen.
Sent from my LG-D801 using XDA Premium 4 mobile app

I've found that rebooting the phone after taking it off of charge, the battery life is awesome. There seem to be some wakelocks that kill the battery and for some reason, charging has something to do with it.

I don't know if this is why, but I heard the G2 has special screen technology that greatly reduces battery drain.
Sent from my VS980 4G using Tapatalk 4

Those claiming that Android System > Screen for battery use on the G2...I'm coming from a Nexus 4 which is also IPS.

jesssiii said:
I don't know if this is why, but I heard the G2 has special screen technology that greatly reduces battery drain.
Sent from my VS980 4G using Tapatalk 4
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Click to collapse
Yeah, somthing about 30% lower battery use or something like that. It's 6 hours since I took mine off the charger, must admit very moderate use, some toying, some photos, some mails and 1 phone call. but still, my phone is at 96% battery. My old S2 would be at 60% at this point.

kayrune said:
Yeah, somthing about 30% lower battery use or something like that. It's 6 hours since I took mine off the charger, must admit very moderate use, some toying, some photos, some mails and 1 phone call. but still, my phone is at 96% battery. My old S2 would be at 60% at this point.
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Click to collapse
What's your highest battery user?
I'm at 93% after 5 hours with only a dozen SMSes, an IMAP push account with a few emails, and 2 other pop accounts, very light use...Android System is 34%, Screen 21%.

Mize said:
What's your highest battery user?
I'm at 93% after 5 hours with only a dozen SMSes, an IMAP push account with a few emails, and 2 other pop accounts, very light use...Android System is 34%, Screen 21%.
Click to expand...
Click to collapse
System was 30, Screen was 28

FredWorrell said:
I've found that rebooting the phone after taking it off of charge, the battery life is awesome. There seem to be some wakelocks that kill the battery and for some reason, charging has something to do with it.
Click to expand...
Click to collapse
I tried this and it worked. However, one instance is not proof I guess haha. I will experiment more tomorrow (namely, not rebooting after charging) and let you know what I find. I wonder what specifically about charging may cause wakelocks?

Over 48 hours of use, more than 50% battery left. 3,5 hours screen time. Android system worst offender with 35%, screen 2nd with 25%.
Sent from my LG-D802 using Tapatalk 4

If you look at the programs listed under Android System, try uninstalling the ones that you would never use. This has seemed to help me. But to be honest it was kind of unnessary because the battery life is just crazy badass. In a few weeks or so when the devs have there way this phone is going to be epic.

It is two things, which by the way are great news.
A) LG's screen tech which doesn't refresh pixels when the images are static
and B) IPS
What we can't control is screen power consumption, but guess what? We can control android system consumption through kernels and roms. This means that we can *hopefully* expect EVEN BETTER! battery life since the screen is, for 80% of users, the main culprit for energy drain.

Just a quick note that flashing CleanROM on my ATT LG G2 basically took my battery life from <20% at the end of the workday to just under 80% at the end of the work day with increased use on the CleanROM install. Highly recommended.

Been off the charger since 6:50 this morning. Sitting here at work doing some texting, Words With Friends, and a test call for a co-worker...96% at 12:15pm. My Nexus would have been at 40% by now.

So is Android System different from Android OS?
I normally can squeeze out 15-22 hours since installing Snapdragon Battery Guru. Which has been working great until today.
Here's my situation today:
-100% charge at around 1230am. Light to moderate usage leaves me with
-77% between night before and waking up (only dropped like 2% overnight) at
-830, then i worked from 9 to 1230 so i didnt use my phone too much. But since ive been off work ive been using it more so im not too surprised about my low battery level currently.
But what concerns me is Android OS using half my battery! It says its been active for more than 4 hours and i dont understand where it comes from. Its way more than my screen usage even with a screen time of little over 3 hours.
Anyone know whats up with Android OS? It doesnt tell me what is running when i select it so im lost.
Also ive done many of the suggestions in this thread with positive results. Ive been monitoring my wakelocks and since doing some of the suggestions on here nlpcollector has actually gone down.
Sent from my LG-D800 using xda app-developers app

amazing battery life
osiris010 said:
So is Android System different from Android OS?
I normally can squeeze out 15-22 hours since installing Snapdragon Battery Guru. Which has been working great until today.
Here's my situation today:
-100% charge at around 1230am. Light to moderate usage leaves me with
-77% between night before and waking up (only dropped like 2% overnight) at
-830, then i worked from 9 to 1230 so i didnt use my phone too much. But since ive been off work ive been using it more so im not too surprised about my low battery level currently.
But what concerns me is Android OS using half my battery! It says its been active for more than 4 hours and i dont understand where it comes from. Its way more than my screen usage even with a screen time of little over 3 hours.
Anyone know whats up with Android OS? It doesnt tell me what is running when i select it so im lost.
Also ive done many of the suggestions in this thread with positive results. Ive been monitoring my wakelocks and since doing some of the suggestions on here nlpcollector has actually gone down.
Sent from my LG-D800 using xda app-developers app
Click to expand...
Click to collapse
Just to benchmark .... I used the phone moderatley ..
I did.. a little over 50 hours of total on time
4.75 hours of on screen time,
2 hours of spotify with bluetooth for the entire time,
2 hours of MapMyRun with GPS running ..
then various text messaging and a couple phone calls
The only modifications i've made to the stop experiance is taking of google's location service for programs, but leaving GPS active .. and changing the screen to auto-brightness, baseline of 50%.
I came from the SGS2 ..... with 1 hour of on screen time and the other spotify and bluetooth .. i'd be around 10-20% after 8-10 hours !!!!!

Mines pretty awesome.
Sent from my LG-D800 using Tapatalk 2

I'm not sure if my battery is defective or not. Right out of the box was around 75% and I drained it until it turned off then charged it to full.
Over the next few days at work it's on wifi and then on 3G/4G before /after work. I pull it from the charger at 7:30am and by 7pm its at 40%. Then on Friday night I unplugged it at 12am with 100% and woke up the next day with 80%. It's dropping like 1% about 10-15minutes. Would a factory reset fix the battery drain? or call for a replacement?

marcusrab said:
Just to benchmark .... I used the phone moderatley ..
I did.. a little over 50 hours of total on time
4.75 hours of on screen time,
2 hours of spotify with bluetooth for the entire time,
2 hours of MapMyRun with GPS running ..
then various text messaging and a couple phone calls
The only modifications i've made to the stop experiance is taking of google's location service for programs, but leaving GPS active .. and changing the screen to auto-brightness, baseline of 50%.
I came from the SGS2 ..... with 1 hour of on screen time and the other spotify and bluetooth .. i'd be around 10-20% after 8-10 hours !!!!!
Click to expand...
Click to collapse
wow that's really amazing. ill try that out and disable google location services and see what happens. will that interfere with google now? i mean i would totally sacrifice google now for 50 hours though.
Sent from my LG-D800 using xda app-developers app