Go Back   Android Forums > Android Tablets & MIDs > Nexus 7 (2012)

New Forums: Nexus Player | Nexus 9
Like Tree1Likes
  • 1 Post By whs37

test: Reply
 
LinkBack Thread Tools
Old December 18th, 2012, 07:14 AM   #1 (permalink)
Member
Thread Author (OP)
 
Join Date: Jul 2012
Posts: 262
 
Device(s): Moto G
Carrier: 3

Thanks: 12
Thanked 26 Times in 24 Posts
Default battery life on jelly bean 4.2

Looking for a little info.
I'm currently using a routed kindle 1st gen, running cyanogenmod 10.1 and the battery life isn't great. In a test over night in a 7 hours period (no WiFi, no notification, no sync, no sound, device in standby with screen off) 50% of the battery was used.
Now that seems a bit steep to me. I'm curious if anyone can tell me what the nexusdoes in the same conditions (only app running was battery widget reborn)

I am hoping to get a nexus before too much longer, just curious what to expect.

Advertisements
__________________
Always have your stuff when you need it with Dropbox
Drogyn is offline  
Reply With Quote
sponsored links
Old December 18th, 2012, 07:57 AM   #2 (permalink)
Beware The Milky Pirate!
 
El Presidente's Avatar
 
Join Date: Jan 2011
Location: Scotland
Posts: 27,305
 
Device(s): Xperia Z1, Nexus 7 3G, HTC One X, SGS3 Mini
Carrier: EE

Thanks: 14,363
Thanked 16,370 Times in 8,759 Posts
Default

I can't give you exact stats, but the nexus uses very little when not in use. Certainly much less than that in the same conditions.

http://androidforums.com/nexus-7/659906-nexus-7-battery.html

Have a read of the above for more info.
__________________
Site Rules & Guidelines / Staff List / Ask the Staff
Want to bring naughty posts to our attention? Use:
Be respectful to each other - That's what we're all about.
El Presidente is offline  
Last edited by El Presidente; December 18th, 2012 at 10:24 AM.
Reply With Quote
The Following User Says Thank You to El Presidente For This Useful Post:
Drogyn (December 18th, 2012)
Old December 18th, 2012, 08:36 AM   #3 (permalink)
Junior Member
 
Join Date: Jan 2011
Posts: 79
 
Device(s):
Carrier: Not Provided

Thanks: 2
Thanked 5 Times in 3 Posts
Default

there were some reports of serious batt drain on nexus 7 but that has not been my experience. it gets about what I expected. I guess I'm a light user and its getting me a good 24 hour period; browsing, a little music, a few videos, no games yet. my batt is not yet 'trained' either. i'm running 4.2.1. I will say, at risk of being pummeled by the serious phanbois, the ipad mini we also have is stunning in its batt management. I had no expectations going in, but to me as a tech-head, it is superb in this regard. three days... it feels like it doubles what the nex7 can muster.
as always, anything you are not using you should turn off ... One very good thing about Nexus 7 is the display has HUGE headroom - I have my brightness at about 40% and its still an eyestrainer on overly white backgrounds - so that right there cuts out a lot of batt drain.
cognus is offline  
Reply With Quote
Old December 18th, 2012, 09:51 AM   #4 (permalink)
Senior Member
 
tcat007's Avatar
 
Join Date: Jan 2011
Location: Texas
Posts: 1,723
 
Device(s): Nexus 7, 16gb (GrooveIP, T-mobile Hotspot device)
Carrier: none

Thanks: 66
Thanked 259 Times in 239 Posts
Default

I turn wifi on/off as needed. Turn it off at night. I lose at most 3% in a 12 hour overnight period. I lose 50-75% day use if I'm using it a lot. Battery loss is about the same as my other devices (Optimus-V and Galaxy Player, although I seldom use them anymore, so theirs is now MUCH better).

Make sure you have nothing syncing at night. Make a note of battery app use in evening and again in AM to see what was using juice at night.
tcat007 is offline  
Reply With Quote
Old December 18th, 2012, 10:15 AM   #5 (permalink)
Senior Member
 
whs37's Avatar
 
Join Date: Jan 2011
Location: Florida/Germany
Gender: Male
Posts: 595
 
Device(s): Nexus 7
Carrier: ATT and Deutsche Telecom

Thanks: 106
Thanked 114 Times in 89 Posts
Default

Here is my N7 in a similar situation. Still 68% after two and a half days - mostly in sleep.


Uploaded with ImageShack.us
El Presidente likes this.
whs37 is offline  
Reply With Quote
Old December 18th, 2012, 11:16 AM   #6 (permalink)
Member
 
Join Date: Feb 2010
Location: VA
Gender: Male
Posts: 224
 
Device(s): Nexus S 4G, Galaxy S3
Carrier: Ting

Thanks: 14
Thanked 75 Times in 45 Posts
Default

I use mine in the evenings to read or tweet, google+, browse some. connected to WiFi 24/7. Battery is lasting 2.5 to 3 days before needing to recharge.
Skratte is online now  
Reply With Quote
Old December 18th, 2012, 11:17 AM   #7 (permalink)
Member
Thread Author (OP)
 
Join Date: Jul 2012
Posts: 262
 
Device(s): Moto G
Carrier: 3

Thanks: 12
Thanked 26 Times in 24 Posts
Default

Figured... so I guess it's something with the kindle's battery/the rom...
My battery drop off graph is substantially higher than that.

Anyway, hopefully i'll get hold of an N7 soon and battery won't be an issue
Drogyn is offline  
Reply With Quote
Old December 18th, 2012, 03:00 PM   #8 (permalink)
Member
 
SlyFerret's Avatar
 
Join Date: Dec 2009
Posts: 396
 
Device(s):
Carrier: Not Provided

Thanks: 3
Thanked 26 Times in 26 Posts
Default

Which OS versions are you guys running?

If you're on 4.2.1, did you do a hard reset after the update? I've been dragging my feet on resetting my tablet, buy at this point, I think I need to try it.

Android OS is the biggest battery user on my device. It isn't letting my tablet go into a sleep state properly.

-SF
__________________
Had this been an actual emergency, we would have fled in terror, and you would not have been notified.
SlyFerret is offline  
Reply With Quote
Old December 18th, 2012, 04:38 PM   #9 (permalink)
Senior Member
 
whs37's Avatar
 
Join Date: Jan 2011
Location: Florida/Germany
Gender: Male
Posts: 595
 
Device(s): Nexus 7
Carrier: ATT and Deutsche Telecom

Thanks: 106
Thanked 114 Times in 89 Posts
Default

Quote:
Originally Posted by SlyFerret View Post
Which OS versions are you guys running?

If you're on 4.2.1, did you do a hard reset after the update? I've been dragging my feet on resetting my tablet, buy at this point, I think I need to try it.

Android OS is the biggest battery user on my device. It isn't letting my tablet go into a sleep state properly.

-SF
I am on 4.2.1 also but Android uses very little battery. With normal operation my screen uses 60% - but I have set it on high. Example:


Uploaded with ImageShack.us
whs37 is offline  
Reply With Quote
Old December 18th, 2012, 06:37 PM   #10 (permalink)
Senior Member
 
tcat007's Avatar
 
Join Date: Jan 2011
Location: Texas
Posts: 1,723
 
Device(s): Nexus 7, 16gb (GrooveIP, T-mobile Hotspot device)
Carrier: none

Thanks: 66
Thanked 259 Times in 239 Posts
Default

Here's mine, fairly typical:
(Can't believe it's 72 degrees in December!)

edit: PS, I never have done a hard reset. I seldom turn it off at all.

tcat007 is offline  
Last edited by tcat007; December 18th, 2012 at 07:09 PM.
Reply With Quote
sponsored links
Old December 18th, 2012, 07:08 PM   #11 (permalink)
Member
 
SlyFerret's Avatar
 
Join Date: Dec 2009
Posts: 396
 
Device(s):
Carrier: Not Provided

Thanks: 3
Thanked 26 Times in 26 Posts
Default

Yeah, you guys don't seem to be having the battery issue that some folks are. Decided to suck it up and do a hard reset on my tablet to see if that helps.

-SF
SlyFerret is offline  
Reply With Quote
Old December 19th, 2012, 02:17 AM   #12 (permalink)
Senior Member
 
Join Date: May 2010
Posts: 593
 
Device(s): Motorola Droid RAZR, RAZR MAXX HD, Google Nexus 7.
Carrier: Verizon Wireless

Thanks: 107
Thanked 83 Times in 77 Posts
Default

leaving wifi and gps on 100% of the time I typically get 3 days use. of course my usage is primarily kindle reading and random browsing. I'm definitely not a heavy user.
__________________
~ ~ ~ ~
If you get an answer to a question, do everybody else a favor and post back your results.
~ ~ ~ ~
seVer is offline  
Reply With Quote
Old December 19th, 2012, 10:06 AM   #13 (permalink)
Senior Member
 
tcat007's Avatar
 
Join Date: Jan 2011
Location: Texas
Posts: 1,723
 
Device(s): Nexus 7, 16gb (GrooveIP, T-mobile Hotspot device)
Carrier: none

Thanks: 66
Thanked 259 Times in 239 Posts
Default

I find leaving wifi on effects drain greatly. It flat-lines at night with it off, but if on it will drop 10%. I have a question, why would battery stats be so different from one day to the next, not power cycling or charging between? Example from current charge:

tcat007 is offline  
Reply With Quote
Old December 19th, 2012, 10:12 AM   #14 (permalink)
Senior Member
 
whs37's Avatar
 
Join Date: Jan 2011
Location: Florida/Germany
Gender: Male
Posts: 595
 
Device(s): Nexus 7
Carrier: ATT and Deutsche Telecom

Thanks: 106
Thanked 114 Times in 89 Posts
Default

In your case the differences are really not that big. And since % is a relative number (not an absolute number), the picture can quickly change if only a couple of elements are different. And since the usage is never exactly the same from one day to another, those differences occur.
whs37 is offline  
Reply With Quote
Old December 19th, 2012, 03:57 PM   #15 (permalink)
Senior Member
 
tcat007's Avatar
 
Join Date: Jan 2011
Location: Texas
Posts: 1,723
 
Device(s): Nexus 7, 16gb (GrooveIP, T-mobile Hotspot device)
Carrier: none

Thanks: 66
Thanked 259 Times in 239 Posts
Default

I realize the differences can easily change, but why do apps that had usage the day before completely disappear? Is it only recent data, and if so how recent? As I said, not turned off or plugged in.
tcat007 is offline  
Reply With Quote
Old December 20th, 2012, 01:12 AM   #16 (permalink)
Junior Member
 
Join Date: Nov 2012
Posts: 49
 
Device(s): Nexus 7 wifi
Carrier: Not Provided

Thanks: 16
Thanked 9 Times in 6 Posts
Default

My screen brightness is turned clear down. Last night my battery was at 17% so I checked my screen on time. I got 5 hours and 51 minutes of actual use from the Nexus 7. This included about 2 days of idle time with wifi on and bluetooth off. The main apps I used included firefox, tunein radio, angry birds, accuweather, and a few others.

tcat007, I see you're using Naked Browser. I just installed it last night and it looks promising.
balloonshark is offline  
Reply With Quote
Old December 20th, 2012, 11:32 AM   #17 (permalink)
Member
 
SlyFerret's Avatar
 
Join Date: Dec 2009
Posts: 396
 
Device(s):
Carrier: Not Provided

Thanks: 3
Thanked 26 Times in 26 Posts
Default

Quote:
Originally Posted by SlyFerret View Post
Yeah, you guys don't seem to be having the battery issue that some folks are. Decided to suck it up and do a hard reset on my tablet to see if that helps.

-SF
Doing the hard reset didn't help.

Using the Better Battery Stats app, I've been able to determine that "baseband_xmm_power" is what is keeping my N7 from sleeping correctly and causing the "Android OS" to show a huge percentage of battery use for me.

I'm using the 3G N7 with an AT&T SIM card, but I'm almost always on wifi. Oddly enough, putting the device into airplane mode to disable the cellular radio and then turning on WiFi doesn't seem to help.

I've seen one person who suggests that putting the device in airplane mode, rebooting, and then turning off airplane after the reboot. I'm trying that now, but it will probably be another day or so before I really can tell if that made a difference.

I hope Google can get a fix out soon!

-SF
SlyFerret is offline  
Reply With Quote
Reply


Go Back   Android Forums > Android Tablets & MIDs > Nexus 7 (2012)
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 07:29 PM.
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.