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Galaxy tab 7" : low battery life

Any suggestions?
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rnbalala said:
Any suggestions?
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Whats the OS version.
** should be in the Q &A **

It is the standard one which comes with the tablet...
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Turn off 3G data, bluetooth, GPS, and wifi when not using it.
Try charging to 100% with tab switch on, once at 100% pull charge lead out and power down tab, then with tab switch off plug charger in again and charge to 100% once thats done unplug charger then boot and use tab as normal.
On my tab witch is rooted and using custom rom i find 3G Data eats my battery very fast but with it off my tab lasts a lot lot longer.

3g is a huge battery hog. I don't use it very often. I get 2-3 days poor of mine which includes 10+ hours of stereo Bluetooth per day and then 3 hours of 3g internet browsing. Also, having the screen off most of the time helps lol.
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Mine also standard using dxjpe 2.3.3 average daily usage tweetcaster,contract killer,browser,wifi,xda,tagged etc could hit 8-10h
sent from my 2.3.3|dxkg3 DJGalaxy S2

rnbalala said:
Any suggestions?
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Sell it ?

You must have a rogue Tab or doing something wrong.
As I'm typing this, I'm at 60% left and Tab has been unplugged for 57 hours according to Battery Indicator Pro, and I never turn off wifi, set sleep policy to "never", cause I have Gmail, calendar, Email app and other stuff like Google+, seesmic and so forth syncing automatically. Ofcourse 3g is turned off, don't have a plan yet.
Battery life on this thing is amazing.
Sent from my SCH-I800

LordLugard said:
You must have a rogue Tab or doing something wrong.
As I'm typing this, I'm at 60% left and Tab has been unplugged for 57 hours according to Battery Indicator Pro, and I never turn off wifi, set sleep policy to "never", cause I have Gmail, calendar, Email app and other stuff like Google+, seesmic and so forth syncing automatically. Ofcourse 3g is turned off, don't have a plan yet.
Battery life on this thing is amazing.
Sent from my SCH-I800
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57h?? wth???? How u did that?
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Try This
rnbalala said:
It is the standard one which comes with the tablet...
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Hi Try updating to Gingerbread
Use the bellow link and resources -
http://www.youtube.com/watch?v=iWiKGB3RJI0
You Battery life will improve lot.
Have a Good Time.

[Q] help with my battery performance?

Can anyone look at these screenshots and advise me on how I can get better performance from my battery? I just flashed SkyICS (latest version) hoping to get better performance from my battery, but it doesn't seem to help. This is with what I would consider medium to heavy usage. I used my phone most of the day to browse the web and check facebook.
Any ideas?

Yeah a bigger battery and some fairy dust
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That's with an extended battery....

Bro heavy users like you and me can only get by by keeping a charger on hand undervolting underclocking
Edit: but 4.0 rom's don't have custom kernels yet
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Looks like the screen has been on for at least 4 hours. All you can really do is underclock it and freeze all the stuff you don't use.

Guess I will research how to underclock.... any good starting points?

You can't if your on ics
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nrm5110 said:
You can't if your on ics
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But what if I told you that I do

xcrazydx said:
But what if I told you that I do
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I would ask you how?

X you really are crazy but your right
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benstudley said:
I would ask you how?
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I prefer no frills cpu. It will report the wrong settings when the toast pops up, but if you check cpu spy you will see it's working

Here's a couple basic and obvious tips and you might already know this, but no one has mentioned it yet in this thread so...
Turn wifi off when there are no wifi networks to join, but I've heard not to let it sleep when you are wifi connected.
Leave bluetooth and gps off when not using it. I don't let allow any of google's location services to run in the background myself. Not sure how well that helps the battery though.
Some people say leaving off autobrightness turned off will help battery life and some say leaving it turned on is better for battery performance. I'm not sure who is right but you might try it both ways and see if one is better for you.

I've tried most of those things and they don't seem to help.
I'm in an area with lte but coverage is spotty at work. Could that be what is mainly killing the battery?
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benstudley said:
I've tried most of those things and they don't seem to help.
I'm in an area with lte but coverage is spotty at work. Could that be what is mainly killing the battery?
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Crappy signal is a huge drain
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I am using sky ics rom from Sean with base z3 and the latest update... love the performance ....
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here are the screenshots
Here are my screenshots
Edit 1: the screen on time is 2h 12 min and the phone calls are nearly 2 hours

fpshah said:
Here are my screenshots
Edit 1: the screen on time is 2h 12 min and the phone calls are nearly 2 hours
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This is impressive battery life, if I may ask, what ROM are you using?

88% after 41 minutes of checking facebook and Google Reader? Is that normal? On wifi I should add...
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benstudley said:
88% after 41 minutes of checking facebook and Google Reader? Is that normal? On wifi I should add...
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There is no normal, everyone has different setups, different apps, and different lifestyles. If you're saying the screen has been on for 41 minutes, that seems ok.

Thanks for the help everyone. I guess I'll just keep chargers handy

Battery question

I've been having pretty bad battery life for some reason.. I was wondering if maybe its bad to use my phone while its plugged in? Like just browsing at night while charging? I can see the battery percentage drop really frequently while using it. Any thoughts?
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goldenshibby said:
I've been having pretty bad battery life for some reason.. I was wondering if maybe its bad to use my phone while its plugged in? Like just browsing at night while charging? I can see the battery percentage drop really frequently while using it. Any thoughts?
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I use my phone all night while it's plugged in, haha.
And is the battery dropping WHILE charging? If so, your charging plug or your wire itself is damaged. It's odd to see battery declining, even during use, while charging.

Oops.. Sorry I phrased that wrong. I meant that the battery percentage drops fast just in general. One minute its at 100 and then in a minute or two its down to 99. Not sure what's up.
By the way I'm on hyperdrive 7 with stock kernel.
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goldenshibby said:
Oops.. Sorry I phrased that wrong. I meant that the battery percentage drops fast just in general. One minute its at 100 and then in a minute or two its down to 99. Not sure what's up.
By the way I'm on hyperdrive 7 with stock kernel.
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Oh, haha okay.
Well it's normal for your battery to drop down to 99% in a minute or two, because the battery can't sustain 100% max for too long. If your battery life can last you throughout the day, I would say you should be fine. But, if you're like me, I would use a conservative-based governor, no matter the kernel. I use KTweaker.

Mind showing a screenshot of your battery stats?
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The weird thing is that the battery goes down fast even when I'm not using the phone. Yeah I'll upload a screenshot tonight. Thanks.
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goldenshibby said:
The weird thing is that the battery goes down fast even when I'm not using the phone. Yeah I'll upload a screenshot tonight. Thanks.
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Like how fast you think?
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Firmware 1.0.B.4.152/1.0.A.4.11

Just got the update! Seems pretty nice. It added an lot of features!
However I can't see any new what faces as they promised.

burshturs said:
Just got the update! Seems pretty nice. It added an lot of features!
However I can't see any new what faces as they promised.
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Youcan customize and create your own watch faces now...You can do it on the phone via smartwatch app within smartconnect....
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thearif said:
Youcan customize and create your own watch faces now...You can do it on the phone via smartwatch app within smartconnect....
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I see it know. Thanks man!

For which MN2 or SW2?
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pl8715 said:
For which MN2 or SW2?
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For SW2

Thought so. Sony's policy is the same as Samsung's if you want the latest firmware? Buy the latest device.
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Double tap screen is cool too. I did, however, see a major change in battery life. I used to get 3 to 4 days and now I barely get one. Anyone else notice the same? I was wondering if it might be because I made a very busy custom watch face, but curious to see others' feedback...
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tbonanno231 said:
Double tap screen is cool too. I did, however, see a major change in battery life. I used to get 3 to 4 days and now I barely get one. Anyone else notice the same? I was wondering if it might be because I made a very busy custom watch face, but curious to see others' feedback...
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I also have a massive battery drain in 5/6 hours 40% left
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I have about 3% battery drain every hour with a watchface with 5 widget.
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I saw someone mention in another thread that it might be double tap to wake causing the drain. I just turned it off; will report back after a day or two.
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I can confirm significant battery drain with double tap to wake turned on. I turned it off and my battery life returned to normal, even with 5 widgets on the watchface!
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[Q] What's the normal charging time of Tab 2 7.0 3g ?

I have a gt-p3100 and it takes about five hours to fully charged not really 100% but just 99% and from 99% to 100% it takes about an hour.
Is it normal or it doesn't,and If it doesn't what is the problem?
Thanks in advance
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crewpuk13th said:
I have a gt-p3100 and it takes about five hours to fully charged not really 100% but just 99% and from 99% to 100% it takes about an hour.
Is it normal or it doesn't,and If it doesn't what is the problem?
Thanks in advance
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Oh yeah, my teacher's Tab got that issue too.
Charge it while it's turned on, she says it always solves it and cuts charging time by half

fr4n said:
Oh yeah, my teacher's Tab got that issue too.
Charge it while it's turned on, she says it always solves it and cuts charging time by half
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No I changed it while it's turned on and took about 4.5 hours to 99% after that it took about an hour to 100%.
Do you have any idea why ?
Thanks before
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crewpuk13th said:
No I changed it while it's turned on and took about 4.5 hours to 99% after that it took about an hour to 100%.
Do you have any idea why ?
Thanks before
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Turned on? That's a way high time!
Are you using stock ROM or CM ROM?

I tried both and still the same,I don't have any idea why
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crewpuk13th said:
I tried both and still the same,I don't have any idea why
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Is your Tab/battery "old'?
Maybe the battery got some problem.

I have this tab since one year ago.
I thought the same as you,I think the battery got some problem.
Anyway thanks for your help
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crewpuk13th said:
I have this tab since one year ago.
I thought the same as you,I think the battery got some problem.
Anyway thanks for your help
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My Tab is 8 months old and never had that issue. Maybe it's software, maybe it's hardware.
You could try a different charger, too.

I borrowed my friend's USB cable and I changed my tab with my charger but using my friend's USB cable.
It took 2 minutes / 1% and when I using my cable it took about 3 minutes / 1% so I I think the cable is the problem.
BTW thanks bro for helping me
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crewpuk13th said:
I borrowed my friend's USB cable and I changed my tab with my charger but using my friend's USB cable.
It took 2 minutes / 1% and when I using my cable it took about 3 minutes / 1% so I I think the cable is the problem.
BTW thanks bro for helping me
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Good to know that everything is alright now! :thumbup:
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Buy a 2.1amp charger. It cuts down on charging time significantly
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