Help Battery Sleep Drain

Gnok31 · Jan 25, 2012

I charged my phone to 100% and unplugged it overnight. In 7 1/2 hours the battery dropped to 72% so that's like 3-4% an hour. I'm not rooted and it's only connected to wi-fi with no apps running. Is this what other people are experiencing with a stock GN? My Eris never drained this fast just sitting on my nightstand. :thinking:

I just got the extended battery last week but it seems like it doesn't make a difference here.

batwings1 · Jan 25, 2012

When I've done something similar to you, I've typically dropped about 20% overnight. Not quite as bad as you but still an issue.

Hoping that the next update will actually help battery performance.

Lohung · Jan 25, 2012

ok so somethign is obviously waking up your phone. check your running apps its waking your phone up and turning on your Wifi it seems... go to settings> apps> running

a lot of games stay running in the background so they can check for updates or if they are online related like Tiny Towers or Little Empire they will want to keep checking for updates. A lot of DEMO versions of the games will do that to

Gnok31 · Jan 25, 2012

Lohung said:
ok so somethign is obviously waking up your phone. check your running apps its waking your phone up and turning on your Wifi it seems... go to settings> apps> running

a lot of games stay running in the background so they can check for updates or if they are online related like Tiny Towers or Little Empire they will want to keep checking for updates. A lot of DEMO versions of the games will do that to

Just checked running apps and there doesn't appear to be anything unusual. I don't think it's game updates since I have apps like words with friends set to update every hour (does that really drain 4% each time?).

JohnKuczek · Jan 25, 2012

Looking at your history details, it appears that your WiFi is sleeping, and your data is reverting to 3G/4G. If you set the WiFi to never sleep in Settings > WiFi > Advanced > Keep WiFi on during sleep you will see less drop.

Gnok31 · Jan 25, 2012

JohnKuczek said:
Looking at your history details, it appears that your WiFi is sleeping, and your data is reverting to 3G/4G. If you set the WiFi to never sleep in Settings > WiFi > Advanced > Keep WiFi on during sleep you will see less drop.

Interesting, I'll give that a try tonight. It was set for "Only when plugged in". But even with 4G on and the phone idling, I never expected the battery to decline that fast. Hopefully the next update will address the Android OS "keep awake" issue.

s.m.knipe · Jan 25, 2012

also (and I am sure someone else will be more knowledgeable than I on this), wasn't there an app like "Tasker" that will shut down things like auto-sync and such between certain hours? Whatever app that was, it might help you out too...

gapi · Jan 25, 2012

I'm rooted running the config in my signature and only loosing 3 - 4 % in 8 hrs.

Lohung · Jan 25, 2012

well Juice defender does a wonderful job.. it turns off all data and wont let it come back on from the hours of 1am-6am... try it out there is some insane customization on it

Deleted User · Jan 26, 2012

Solutions like Juice Defender and uninstalling apps are the hard way around.

Download BetterBatteryStats (all one word) - you can get it for free from XDA Developers where the dev has posted it, or you can download it from the market for a couple bucks.

I can't remember if it has to collect stats, or if the stats were already there and it just analyzes them - but in any event, after an idle period like that, you should open the app and look for "Partial Wakelocks" and see what app is consuming that battery life.

That said, I think the Wifi switch above will significantly help.

gapi · Jan 26, 2012

binary visions said:
Solutions like Juice Defender and uninstalling apps are the hard way around.
Download BetterBatteryStats (all one word) - you can get it for free from XDA Developers where the dev has posted it, or you can download it from the market for a couple bucks.
I can't remember if it has to collect stats, or if the stats were already there and it just analyzes them - but in any event, after an idle period like that, you should open the app and look for "Partial Wakelocks" and see what app is consuming that battery life.
That said, I think the Wifi switch above will significantly help.

I agree but for the most part with out Rooting your just putting on band aids.

s.m.knipe · Jan 26, 2012

What about using something like NFC task launcher? Make a tag that will shut off auto-sync/wifi/etc. when tapped, and just set the tag on your desk or whatever at night? I might play with that tonight and see what kind of battery life it ends up with...

s.m.knipe · Jan 26, 2012

binary visions said:
Solutions like Juice Defender and uninstalling apps are the hard way around.

Download BetterBatteryStats (all one word) - you can get it for free from XDA Developers where the dev has posted it, or you can download it from the market for a couple bucks.

I can't remember if it has to collect stats, or if the stats were already there and it just analyzes them - but in any event, after an idle period like that, you should open the app and look for "Partial Wakelocks" and see what app is consuming that battery life.

That said, I think the Wifi switch above will significantly help.

Yeah, I forgot about that app, that battery stats app should help ID the culprit (aka determine solution). Does that app let you wipe the battery stats log file (reset the calibration)? I can't remember

Deleted User · Jan 26, 2012

gapi said:
I agree but for the most part with out Rooting your just putting on band aids.

I'm not sure what you mean?

You don't have to root to get good battery life out of this phone. I have three coworkers with the GNex and all of them get good battery life.

Using BBS, you can find misbehaving apps, and get rid of them - it only takes one bad app to kill your battery life. A friend with a GSII was getting 6 hrs. of battery life, installed BBS, found his IM app was keeping his phone awake, removed it, and now he gets 20 hours.

Deleted User · Jan 26, 2012

s.m.knipe said:
Yeah, I forgot about that app, that battery stats app should help ID the culprit (aka determine solution). Does that app let you wipe the battery stats log file (reset the calibration)? I can't remember

Google went on record as saying that wiping the battery stats does exactly nothing for the calibration. They indicated that the battery stats log file only tracks application usage of the battery, it is not referenced or consulted when calculating time left on the battery.

The full charge/discharge cycle is what calibrates the battery meter.

quickaudi · Jan 26, 2012

gapi said:
I agree but for the most part with out Rooting your just putting on band aids.

I would almost agree, unless he has an app that is initiating wakelock for no reason (except due to bad app design.)

Had this issue with Handcent 3-4 revisions ago. Made my X and wife's Tbolt battery drop significantly due to wakelock.

Rooting doesn't fix a "bad" app, period.

s.m.knipe · Jan 26, 2012

binary visions said:
Google went on record as saying that wiping the battery stats does exactly nothing for the calibration. They indicated that the battery stats log file only tracks application usage of the battery, it is not referenced or consulted when calculating time left on the battery.

The full charge/discharge cycle is what calibrates the battery meter.

Oh, thanks! I guess I missed that...

Gnok31 · Jan 27, 2012

So I took everyone's advice and set wifi to "keep on" and I installed BetterBatteryStats. With the phone off the charger with 96%, the battery drained down to 81% in over 7 hours. It's an improvement from before but that's still about 2% drain an hour, which still seems high to me. I can see from the Partial Wakelocks that Facebook was the biggest culprit but it was only active for 4 minutes if I'm reading it correctly.

Unless there's any other tweaks out there is this the most I can expect out of a stock GN?

Deleted User · Jan 27, 2012

2% per hour is not bad, and you just won't get a lot better with a smartphone unless you put it in airplane mode.

Keep in mind, your phone has persistent open connections to some servers, and regular polling intervals for other servers. I mean, you could go through and kill everything - stop Facebook from syncing, turn off your email sync, disable any accounts you might have, etc. But then it's hardly a smartphone, is it?

I have LeanKernel installed with an optional setting that actually disables one of the CPU cores when not in use. With that installed, I'm down to about 1% an hour when idle. That depends on other things, though, too. Lately I've been playing Words With Friends, so I have that app syncing every 10 minutes, so I'm getting slightly less battery life when idle. I have a couple email accounts, my weather app syncs every 30 minutes, a few things like that...

I was pretty impressed that I had it down to 1% per hour, frankly. I think 2% is pretty reasonable.

Gnok31 · Jan 27, 2012

binary visions said:
2% per hour is not bad, and you just won't get a lot better with a smartphone unless you put it in airplane mode.

Keep in mind, your phone has persistent open connections to some servers, and regular polling intervals for other servers. I mean, you could go through and kill everything - stop Facebook from syncing, turn off your email sync, disable any accounts you might have, etc. But then it's hardly a smartphone, is it?

I have LeanKernel installed with an optional setting that actually disables one of the CPU cores when not in use. With that installed, I'm down to about 1% an hour when idle. That depends on other things, though, too. Lately I've been playing Words With Friends, so I have that app syncing every 10 minutes, so I'm getting slightly less battery life when idle. I have a couple email accounts, my weather app syncs every 30 minutes, a few things like that...

I was pretty impressed that I had it down to 1% per hour, frankly. I think 2% is pretty reasonable.

It's an improvement for sure but I still can't understand how some people can have their batteries last over a day. I guess I can only hope that a future update will improve things.

I also want to try this with my gf's iPhone4s. That battery always lasts so much longer than my GN, at least 50% more. I know it's a different OS and it doesn't have 4G and whatnot but that's still pretty impressive considering it's smaller battery and that it's still a smartphone and it does most typical smartphone things.

Crashumbc · Jan 27, 2012

Gnok31 said:
It's an improvement for sure but I still can't understand how some people can have their batteries last over a day. I guess I can only hope that a future update will improve things.

I also want to try this with my gf's iPhone4s. That battery always lasts so much longer than my GN, at least 50% more. I know it's a different OS and it doesn't have 4G and whatnot but that's still pretty impressive considering it's smaller battery and that it's still a smartphone and it does most typical smartphone things.

2% and hour is 50 hours, just over 2 days.

Its always surprising to me HOW many iphone users use their phones VERY little. They check FB like twice a day, send 3-4 texts, and that's it.

You have to keep in mind that by the mere fact of being here you're a tech. geek

and probably use your phone 5 times more then the average person. So comparing your battery usage to theirs is flawed.

Disclaimer: iPhones have in my experience very good battery usage and generally a fair amount better a comparable Android.

Deleted User · Jan 27, 2012

The iPhone gets its improved battery life by locking down what applications are allowed to do in the background. It's not a bad way to do things, just a lot more restrictive - but it's pretty easy to extend battery life when applications are only allowed to do 3-4 things in the background, and all of them are directly user initiated (e.g. playing music).

Different design philosophy. That said, under similar usage conditions, I suspect you'd see similar battery life (typically better on the iPhone, but not by a lot). I owned two different iPhones and now two different Android phones, and I get similar battery life with all of them.

gapi · Jan 27, 2012

binary visions said:
You don't have to root to get good battery life out of this phone.

OK.

Gnok31 · Jan 28, 2012

Tried this once more last night and there was a bigger improvement as it went from 100% to 91% in just over 8 hours. This is all I was hoping for but then I looked at my gf's iphone and the battery didn't decrease at all during the same time. :eek:

Well I'll still be satisfied if this keeps up.

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