Database Users

Legend battery life

Hi to all!
I'm thinking of buying either the Legend or Desire. There are two things that are important to me. The battery life and storing applications on the memory card. I suppose that the latter will be taken care of by the upcoming update to Froyo (if it ever happens!). How about the battery life? How long does it last on the Legend? Would anyone have any experience with the Desire vs the Legend on this? All comments appreciated!
Thanks in advance!!!

I don't have experience with the Desire but my Legend performs battery wise as expected from a smartphone I guess.
After the last update I discovered for example that leaving Google Reader open in the browser in the background drained power, so I now leave the browser always on the google homepage or kill it altogether when I'm not using it and I've seen an increase in battery life.
Anyhow, I give it a pretty intense use, on a work day I listen to podcasts on it for some hours at least, I connect it to my car bluetooth on the commutes (40 mins average total), read email, etc. And it lasts me the full day without problems, usually ending the day with 30% or more battery left.
It obviously depends on how each one uses their phones, as tricks like the Reader one I mentioned can make a difference.

The Legend seems to have slightly superior battery to me. My legend ends the day at about 30 percent after 2 hours of Bluetooth stereo playback, and plenty of latitude use and web browsing. My partner's new desire ends the day about about the same but without the music playing I do.
I was jealous of the desire when my partner bought it but If I had the choice of legend or desire again, it would be a hairline decision to buy legend again. If Legend had live wallpaper I would choose legend without doubt.
Sent from my HTC Legend using XDA App

My battery life is even better than my old dumbphone. With medium use and pretty stringent management (ie. a task killer, bluetooth and wifi off unless I need them), I can get about five days on a charge.
Sent from my HTC Legend using XDA App

sturk91 said:
My battery life is even better than my old dumbphone. With medium use and pretty stringent management (ie. a task killer, bluetooth and wifi off unless I need them), I can get about five days on a charge.
Sent from my HTC Legend using XDA App
Click to expand...
Click to collapse
Are you sure you are using the original battery ? I have never heard anyone reporting 5 days on any smartphone on even minimal usage. Legend seem to give 1 to 2 days max on minimal usage.

lessirey said:
Are you sure you are using the original battery ? I have never heard anyone reporting 5 days on any smartphone on even minimal usage. Legend seem to give 1 to 2 days max on minimal usage.
Click to expand...
Click to collapse
I have on two occasion to manage get three days but five days? Naah, not with the original battery.

Well if you disable APN the thing can last 5 days, but with net connection active definitely no way.

I can believe he gets 5 days out off this phone. I can get 3 days out of it with very good reception, some hours of browsing and 20 texts a day. Almost no calling and 3G always on AND WITH A GOOD TASK KILLER I always kill almost every app before putting it in standby you just need to know what you can and can't kill.

I can do 3 days with low use (maybe 10min calls and 20sms a day) and APN off most of the time.
With APN on I don't think it will last more than 2 days max

Just to clarify, I do turn off my mobile internet unless I'm using it at that moment, and yes I'm using the stock battery.
Sent from my HTC Legend using XDA App

Sure, if you turn everything off it'll last a few days, but then might as well carry a dumbphone

Hey all,
I've been using Azure 1.0 on my Legend.
In case anyone is wondering what battery life is like on this ROM [I know I wanted to know before I decided to run it...] :
I've just got the best usage for this ROM in terms of battery life, since I started using it [0.5].
I haven't gone for Azure 1.0.1, and have stuck to 1.0 as I didn't have any APN issues...
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Voice calls = 1hr 3m 15s + SMSing
WiFi = 6hr 46m 46s
For the hours that WiFi was not on, Data [H/3G] was always enabled.
Approx 1hr 45min of browsing
Approx 10 emails received and replied to
Battery life was pretty poor when I first installed the ROM.
Then I used SetCPU to help....but it didn't seem to help too much...
Now I am seeing better battery life, like the above.
No idea if this is good/bad for this ROM, but for me, its the best I've seen yet....
...though still probably not as good as I first saw on the stock ROM before the update which messed up the stock SMS app was pushed out...

18 hours ~ 24 hours average. 1 and a half day or so if I'm lucky.
2G network. only switch on 3G when it's needed.
Wi-Fi, gps and bluetooth if needed. If not, it's turned off all the time.
always leave my Trillian (MSN/YM/gTalk) turned on almost all the time (like 75% of the time).
WhatsApp for 24 hours.
Mail fetching every 4 hours.
Twidroyd fetching every 15 minutes.
Urbandictionary widget fetching every hour or so.
15 minutes of call average.
Texting about 10-20 times a day.
And data counter widget running all the time.
Rooted and using a nice clean ROM called "CleanEclair 1.6.2"
Got a good Task Manager too.
It's definitely better than my old iPhone 3g.
BUT, if you are asking "Desire or Legend"
I may choose desire for it's better hardware.
PS: Sorry about my bad english.

Just to echo previous statements about battery life, I too get an easy 24 hours from my UK Legend. It usually has at least 30% charge left when I plug it in at night (10-11pm), this is from about 6am. As I type this as 4.30pm it has 69% left.
I leave data and wifi on all the time but only enable GPS & Bluetooth when needed. The phone connects by wifi at home but is in a marginal 2G location when I'm at work (cheers, Vodafone!) so probably has to work quite hard to keep connected to the network.
Google services and Twitter update constantly, Facebook every hour.
Don't run any task killer apps as I found they made naff all difference.
I do watch how many browser tabs I have open and what's on them thought as I notice that some pages really suck the battery dry.
Navigation is the real killer on the Legend (or any Android I guess); the combination of screen on, GPS enabled and heavy duty data use means it can go flat in as little as 3 hours. A power cable in the car will only supply 500mA, rather than the full 1A that a main scharger will, so it only really slows down the drain on the battery.
Other than that I expect the phone to fit my life, not the other way round. The effort that some expend to micro-manage their battery life really baffles me!

I get terrible battery life...
Typically 7-8hrs , now I use it for work but today I did 30ish minutes of calls, + maybe 1hr's worth of reading emails, sending data etc etc etc.
From looking at the "battery" part of the settings/about screen I can see that Display seams to be the thing EATING the battery..
is this normal?? I do use the power widget and put the screen down as low as it goes when I can however im really shocked at the power usage..
Ive tried using a task killer (advanced task killer) and JuiceDefender and neither make much difference...
any comments?? am I being realistic? I used to have a blackberry 8900 and it would easily last me a whole day , doing the same email load, websurfing, syncing etc, might even last 1.5days but I tend to plug the legend in whenever I can....
Is this normal???
Angelo

asantaga said:
From looking at the "battery" part of the settings/about screen I can see that Display seams to be the thing EATING the battery..
is this normal??
Click to expand...
Click to collapse
I have the same issue, display is always the best battery easter even with the bare minimal usage.
Is it normal guys?

lessirey said:
I have the same issue, display is always the best battery easter even with the bare minimal usage.
Is it normal guys?
Click to expand...
Click to collapse
Yup. Try lowering your screen brightness and see the difference. Screen and gps is the most battery-hungary.

Everything depends on how you use your phone. Try to avoid GPS and max screen brightness. And always remember to kill aps with any of the app killers, after you finished with it.

no0neX said:
Everything depends on how you use your phone. Try to avoid GPS and max screen brightness. And always remember to kill aps with any of the app killers, after you finished with it.
Click to expand...
Click to collapse
Good advice. Except on the task killing. Google around why task killing is not healthy for your phone.

my battery doesn't seem to show the correct level...I can charge it overnight on the mains an in the morning it has only got to 38%. Take the battery out and it goes up to 60ish%. Phone will last about a day, but can't seem to get a full charge into it.

General battery usage

hey pretty new on mt4g so i wanted to gauge battery life and see what other people are seeing. I'll start and lay a rubric for everything I'm seeing
Mytouch4g
Rom cynogenmod 6.1.2RC2
Grankin 2.6.32.27 oc'd to 1.8ghz. Kernel
Have set CPU set for 245mhz on screen off/On demand. And normal is 245 to 1.8ghz on demand ad well. ( Not sure what's good profiling and stuff
Have Facebook and ebuddy and everything is off cept for data. No email only push Gmail
Hitting about 1% every 20 min and when i do browsing for like 20-30 min i lose like 10-15%
Sent from my HTC Glacier using XDA App

stock
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Nice..
Mine can only hold for about 15 hours, lite web browsing, barely phone calls and texts..

I got about 16 hours yesterday. Using CM7. Brightness all the way up. Everything on except wifi. Browsing about 2 hours. About 5 phone calls, 15 mins or more. Used google maps. Did about 20 text msgs. I think that's all I did. Loving the battery life on CM7.

I get like 2 days use out of my phone without charging it. I've always tried to figure out why my battery life is always so much better than my gfs and I think I might have figured it out....I'm always on wifi.
The two places I am the majority of the day (work and home) I am constantly connected to wifi so it keeps my radio from scanning for a bettery data signal so my battery lasts a lot longer.

I have:
Iced Glacier v.1.1.6
Gorilla OC 1.6ghz beta v05 (but runs at 1.7ghz?)
SetCPU set at 1.7ghz ondemand and 245mhz screen off powersave
I get around 16 hours from a full charge, but Im always on the phone and playing with it but I have noticed that my battery does last longer on wifi

after tinkering around with it its working out better.
using
CM7nightlies#9
CM kernel
no setcpu
i get around 20 to almost 24 hours of usage. but most of the time i'm charging or partial charge cause i stream music like a mad man ahha.

stock i can get almost 24 hrs on a full charge im also using screen filter app(awesome app to use) im on pocket empires a lot too

Is it just me or does 100% last longer when fully charged? Has anyone also observed this? ATM I have 93% at 20hour mCPU scaled at 768mhz and around 15-16H moderate use with scale at 1.6GHz on max load.

I bought the Mytouch 4g on black Friday and found problems with the battery life in the first week. 5 Hours maximum without even using it. The camera worked randomly. I exchanged the phone for another one and all my problems were solved. I use the phone for gaming mostly and that drains the battery obviously .
I purchsed the powerskin case from the T-mobile store and I couldn't be more satisfied. I can use my phone for 6-7 hours straight playing games and browsing the web and it still has a full battery with a bar left on the power skin. It may be a little bulky but it brings be back to the good ol days when phones were bricks and adds that extra padding that I feel is necessary for protection. The price tag on the powerskin was $70 at the store but when it was scanned it came up as $40.00.
I highly suggest this product for those with fear of their phone dying unexpectedly.

Mac33 said:
I got about 16 hours yesterday. Using CM7. Brightness all the way up. Everything on except wifi. Browsing about 2 hours. About 5 phone calls, 15 mins or more. Used google maps. Did about 20 text msgs. I think that's all I did. Loving the battery life on CM7.
Click to expand...
Click to collapse
Just because of root your battery is that great? My brightness is off all day and my Data is off and my battery MIGHT last me till like 10:00 PM..

This is probably a silly question, and after quite a while searching I haven't found any real answer, but here goes:
Going from original out-of-the-box to rooted RoyalGinger 2.1, the battery use by my Display has gone WAY down. Like from always being #1 to usually being well below Cell Standy, Phone Idle, Wi-Fi, etc. And it's definitely not that I'm using the Display less.
Has anyone else seen this? Does it have something to do with how RoyalGinger, Gingerbread, etc. calculate battery usage? Is it normal?

ericjwaugh said:
This is probably a silly question, and after quite a while searching I haven't found any real answer, but here goes:
Going from original out-of-the-box to rooted RoyalGinger 2.1, the battery use by my Display has gone WAY down. Like from always being #1 to usually being well below Cell Standy, Phone Idle, Wi-Fi, etc. And it's definitely not that I'm using the Display less.
Has anyone else seen this? Does it have something to do with how RoyalGinger, Gingerbread, etc. calculate battery usage? Is it normal?
Click to expand...
Click to collapse
yes its normal. you came from stock MySense UI(stock Glacier), and Sense builds are known to be battery whores because they look awesome, have loads of interactive widgets, and lots of bloatware as well. going to an AOSP build(CM7, RG) the ROM is very lightweight and contains little to no bloatware and still as fast, maybe even faster. just look at the size of the files...Sense=300+MB, AOSP=80-110MB. plain and simple, all of the bloat consumes more power on your display

clarknick27 said:
yes its normal. you came from stock MySense UI(stock Glacier), and Sense builds are known to be battery whores because they look awesome, have loads of interactive widgets, and lots of bloatware as well. going to an AOSP build(CM7, RG) the ROM is very lightweight and contains little to no bloatware and still as fast, maybe even faster. just look at the size of the files...Sense=300+MB, AOSP=80-110MB. plain and simple, all of the bloat consumes more power on your display
Click to expand...
Click to collapse
Thanks for the prompt reply. I guess I didn't expect the Sense bloat to be reflected in the display usage. Does "Display" include the touch interface as well? If so, I guess I can see why Sense would show up as display.

Display counts more than just the power used by the LED backlighting.
I plugged my phone in yesterday at 14 hours of uptime with 45% battery remaining, after a day of fairly heavy use. Close to three hours of music listening, two hours of screen-on time and 3G/wifi web browsing, forty minutes of voice calls and a few SMS.
Using CM7 nightly #143 and insanity v3 kernel, 122/1017 clocks with smartass governor. I'm sure if I switched from smartass to conservative my battery life would increase a bit, but I like the smoothness that smartass gives me, and even on a day of brutally heavy use, I'll still come home with at least a quarter charge left.

Here's mine. Don't post attention to the time, I rebooted a couple times, it's probably been about five hours on battery. I don't do too many games per se, but I do browse xda and facebook a lot
Sent from my HTC Glacier using XDA App

here's mine (i'm too new to post links):
15h 12m 37s on battery
Android System 44%
Cell standby 22%
Phone idle 18%
Voice calls 8%
Wi-Fi 6%
Display 5%
as you can see (er, read), the display is really low. not sure what's up with system (maybe scanning the sdcard?), usually it's just standby and idle at the top. this is on RG2.1 with the display on auto brightness with defaults.
so this really is normal?

ericjwaugh said:
here's mine (i'm too new to post links):
15h 12m 37s on battery
Android System 44%
Cell standby 22%
Phone idle 18%
Voice calls 8%
Wi-Fi 6%
Display 5%
as you can see (er, read), the display is really low. not sure what's up with system (maybe scanning the sdcard?), usually it's just standby and idle at the top. this is on RG2.1 with the display on auto brightness with defaults.
so this really is normal?
Click to expand...
Click to collapse
yep, that looks about normal for AOSP builds

Well I won't complain. Like I mentioned, I was really surprised at the low battery consumption of the display. Didn't expect that much difference just by changing ROMs. Wish I would've rooted a long time ago.
Thanks again for humoring me and my silly questions.
clarknick27 said:
yep, that looks about normal for AOSP builds
Click to expand...
Click to collapse

Perfect Phone except for battery

I got my SGSII on Sunday and I am extremely pleased with it. Its like the phone of my dreams in almost every way. It's responsiveness, its camera, its form factor, its screen, everything about it was great. Until I noticed that the battery was being drained kinda fast. I rooted it within a day and tried every ROM available so far but none of them alleviated my battery issue. I've read and tried every solution on these forums but nothing works.
I lose approximately 10 percent of battery every 30 minutes and have gained a maximum battery battery life of 8 and a half hours. Ive Frozen most of sammy's bloatware and have optimized it as much as i can. i disabled fast dormancy everything.... I just dont know what to do.

Did you try restoring original Samsung firmware, factory reset with full wipe, and then doing initial setup prior to getting on wifi?
Try this, don't config any account besides google, don't install any software and certainly don't freeze any apps. Monitor phone for a few hours and then post screenshots of Battery Use app for us to see.

I get about 15+ hrs worth.of battery.
With heavy exchange (push) email and quite a few apps.
My problem is random reboots especially when playing music.
Sent from my GT-I9100 using XDA Premium App

Wait for some days. Battery need to calibrate and take some charge to be fully operational.
See pic, I got better battery life than my x10....
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Give it some time. Battery life improves quite a bit after some discharge cycles. Do a factory reset and reinstall as some have mentioned above.
And remember some apps can cause the OS to misbehave.

That's the reason I sold mine. Battery life was unacceptable. Other than that, perfect phone!!! Still looking at this forum hoping for solution to battery problem. Would definitely buy the device back then.

kreoXDA said:
Did you try restoring original Samsung firmware, factory reset with full wipe, and then doing initial setup prior to getting on wifi?
Try this, don't config any account besides google, don't install any software and certainly don't freeze any apps. Monitor phone for a few hours and then post screenshots of Battery Use app for us to see.
Click to expand...
Click to collapse
Thanks for the advice first thing in the morning ill flash KE7, which is what my phone came with, and report back with screenshots and after a few hours.

Any smartphone battery need at least a good month before reaching the maximum potential.
Just wait a couple of days and use custom kernel with SetCPU.
My ex-Arc did the same, first day battery droped 7% every hour on idle but after a week battery could last 3 days

if u continue in this topic its very better. 1 topic about battery is more better
http://forum.xda-developers.com/showthread.php?t=1070324

For me, it's simply because i'm battering the phone with internet use, and generally playing around with it constantly all day while at work.
I get a full day, sometimes two now, depending on how I use it.
My old HTC Desire used to need charging twice a day, until I got my SGS 2, now the Desire needs a charge once every 3 or 4 days, due to the fact I am playing with my new toy! lol
I'd say battery life will improve as time goes on and usage of the phone goes from all day, to normal smart phone usage
In all seriousness, the SGS two outlasts my Desire easily, which is good enough for me. I struggle to kill the SGS 2 in a day.

If you are losing 10% per half hour, is that with the screen on? If so, that is fairly normal. I find that 5 hours of screen on time is the most you'd normally get. If its in standby mode (screen off) and you are losing that much per half hour then something is wrong.
Those you of who are getting amazing battery life, would love to see a screenshot with more than 5 hours screen on time - just to see if it is possible. 3 or 4 days means nothing if its in standby 99% of the time

blue265 said:
If you are losing 10% per half hour, is that with the screen on? If so, that is fairly normal. I find that 5 hours of screen on time is the most you'd normally get. If its in standby mode (screen off) and you are losing that much per half hour then something is wrong.
Those you of who are getting amazing battery life, would love to see a screenshot with more than 5 hours screen on time - just to see if it is possible. 3 or 4 days means nothing if its in standby 99% of the time
Click to expand...
Click to collapse
Yep, how you use the phone is huge. Screen brightness and many other factors like installed apps and what they are doing can have a major impact on batt life. IMO battery life is almost impossible to compare except your own in static usage after making changes. Even idle batt life is effected by push email, weather, etc. In my own usage I was getting poor battery life to start with (multiple charges per day) or was I? There I was screwing around with the phone constantly. Loading this, uninstalling that, taking browsers for test drives, trying launchers, flashing roms, seeing how different games played, showing other people the phone, and so on. The excitement wore off and I got to normal usage (for me) which since I unplugged 17 hours ago is 18 texts, 7 calls all of which were short, and assorted stuff like doing a search, a little web browsing following the search and so on. I'm at 61% showing on batt and my largest user was screen with 59% and then OS with 11%. So this is pretty obvious, cant make it through the day hammering the phone but no problems with what I think most people would consider light usage. Where I'm going is that I think some people may not realize how much they are using their phones in their wahoo new phone frenzy.

blue265 said:
If you are losing 10% per half hour, is that with the screen on? If so, that is fairly normal. I find that 5 hours of screen on time is the most you'd normally get. If its in standby mode (screen off) and you are losing that much per half hour then something is wrong.
Those you of who are getting amazing battery life, would love to see a screenshot with more than 5 hours screen on time - just to see if it is possible. 3 or 4 days means nothing if its in standby 99% of the time
Click to expand...
Click to collapse
Quoted for truth! With normal daily usage about 12-14 hours off the charger you'll see 5 hours of display at the most. GSMArena has done some tests and in airplane mode playing a video on loop on 50% brightness can last a bit over 8 hours. Once you add in having to maintain a cell signal, wifi, push email, idling for another couple hours, it reduces your possible screen time in favor for those other activities.
The best ways to conserve battery are to make sure you don't have rogue apps that are keeping your phone awake when it should be sleeping. Check your battery graph and actually CLICK on the graph to expand it to check if your "awake" bars line up with your "screen on" bars. If they don't, something is wrong and you have to find out what's causing it to stay awake. If you've been browsing (white) websites on wifi for 5 hours and complain when the phone says low battery... tough. You're using the display, wifi, maintaining a cell signal, as well as viewing sites that strain the SAMOLED display the most - white backgrounds.
Based on my experience, my battery life is actually quite good. After 4 hours of idling and only about 20m of display on (auto brightness) I'm still at 91%. After a day's use with about 1h of screen time and 14 hours off the charger (about my avg workday usage) I end up around 65-75% which I consider not too bad and can definitely go 2 days on my average usage. Basically minimizing the battery draw when the screen is off is key since when the screen is on, nothing can stop it from draining the battery.
http://www.gsmarena.com/htc_sensation_vs_galaxy_sii_vs_optimus_2x-review-608p7.php

blue265 said:
Those you of who are getting amazing battery life, would love to see a screenshot with more than 5 hours screen on time - just to see if it is possible. 3 or 4 days means nothing if its in standby 99% of the time
Click to expand...
Click to collapse
Mine,
From 100% to Full drain (Switch Off). Total usage 1d 19h. At 20% Brightness. On XWKE8. More than 5 or 5½ hours is NOT possible, whatever you do. It's not that I am impressed with it, 5 hours isn't enough, 7-8 hours would be good though
Regards.

Well i left my phone idle for approx. 5hrs and im dwn to 63% but now im noticing a problem that i havent noticed before... my Android OS is now taking up 38% with which is more than Display which only took 21% and the phone was constantly waking up. I have no apps runnin in the background nothing else out of the ordinary.

Anarchist310000 said:
Well i left my phone idle for approx. 5hrs and im dwn to 63% but now im noticing a problem that i havent noticed before... my Android OS is now taking up 38% with which is more than Display which only took 21% and the phone was constantly waking up. I have no apps runnin in the background nothing else out of the ordinary.
Click to expand...
Click to collapse
You must have SOMETHING that is eating up the CPU. If you are out of guesses, do a factory reset with data wipe, restore original firmware (if you flashed a custom rom), do another factory reset, configure only gmail, and then monitor the battery usage. It would be losing at most 2% an hour in standby. For me it was 1% every 2 hours (with absolutely nothing running except google) when I tested. I the slowly added my apps making sure I do not install crap and do not configure osmething to always do some **** I do not want.

I don't understand these "battery life sucks" threads.
I have an Unlocked SG2 with stock ROM. It is not rooted, I have not frozen any apps. I have four exchange accounts syncing on push, social networks up and running and widgets on all of my screens. I text and check e-mail frequently throughout the day and I use the camera here and there.
I always get at least 15 hours out of my battery, if not more. For comparison, I was using an iPhone 4 under the same conditions (with the same accounts syncing) minus any widgets or automatic social updates and I was getting roughly the same battery life.
No, this phone won't last you a week with heavy use, but you should easily get a day out of it and I rarely find myself in a situation when I can't charge it overnight. This phone is on par with all of the best battery life smartphones out there, as far as I'm concerned. Those of you getting horrible battery life should probably look into an exchange or maybe an app you recently downloaded. The only time I got really bad battery life was when I ran a live wallpaper that was pegging my CPU.

greyhulk said:
I don't understand these "battery life sucks" threads.
Click to expand...
Click to collapse
Well you are a lucky man then. But I/We do understand.
greyhulk said:
I have an Unlocked SG2 with stock ROM. It is not rooted, I have not frozen any apps. I have four exchange accounts syncing on push, social networks up and running and widgets on all of my screens. I text and check e-mail frequently throughout the day and I use the camera here and there.
Click to expand...
Click to collapse
It's NOT about Frequent email checking or here and there photo shooting, as you can see we are talking about numbers here.
greyhulk said:
I always get at least 15 hours out of my battery, if not more. For comparison, I was using an iPhone 4 under the same conditions (with the same accounts syncing) minus any widgets or automatic social updates and I was getting roughly the same battery life.
Click to expand...
Click to collapse
If you are happy with 15 hours back up with the stuffs you mentioned you do then I've nothing to say. And AFAIK, iPhone 4 has much better battery back up than GS II, in fact it's the only phone, rather smartphonecool which has the best battery back up atm.
greyhulk said:
No, this phone won't last you a week with heavy use,
Click to expand...
Click to collapse
With Heavy use even a Nokia 1200 will not last a week, so it's outta equation.
Regards.

Anarchist310000 said:
Well i left my phone idle for approx. 5hrs and im dwn to 63% but now im noticing a problem that i havent noticed before... my Android OS is now taking up 38% with which is more than Display which only took 21% and the phone was constantly waking up. I have no apps runnin in the background nothing else out of the ordinary.
Click to expand...
Click to collapse
Before going to sleep do these things,
A- Check if 'Auto Sync' is running, Disable it if it was. Same goes for Background Data, Disable it.
B- Go to Task Manager and see if any Apps are running. Close it if some were.
C- In Task Manager, go to RAM tab, Press Clear Memory, it should close the hidden apps were running. ***DO NOT do this if you have some kind of Scheduler application running, it will NOT work then***
D- Download an app like Auto Task Killer.
E- If possible keep the 'Power Saving Feature' on with your desired settings.
Do these first, if not worked, do a Hard reset. For me, it decreases about 5-6% battery (max) in overnight period of 8-9 hours.
Regards.

ithehappy said:
Well you are a lucky man then. But I/We do understand.
It's NOT about Frequent email checking or here and there photo shooting, as you can see we are talking about numbers here.
If you are happy with 15 hours back up with the stuffs you mentioned you do then I've nothing to say. And AFAIK, iPhone 4 has much better battery back up than GS II, in fact it's the only phone, rather smartphonecool which has the best battery back up atm.
With Heavy use even a Nokia 1200 will not last a week, so it's outta equation.
Regards.
Click to expand...
Click to collapse
I'm not sure what you mean by "battery backup". Are you referring to standby time? Yes, the iphone does better in that department, but that's not typical daily use. Phones are meant to be used, not sit around for days at a time. Iphone can do this because it doesn't truly multitask and no data is syncing. Either you have a faulty device, bad Rom, or your expectations are unrealistic .

44 Hours of battery life!!!!

I'm running Toxic Crazy8, stock battery, Bali Kernel, undervolted an extra -25v across the board, reduced clock speed to 400mhz when screen's off. Light use gave me 44 hours of battery!
I probably could have pushed it even further. The first night it was updating 35 apps over wifi, and that sucked up almost 60%
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Got even better battery life? Post a screenshot =)

That's great an all but it comes slow. Try multitasking or play a simple game. It will lag like crazy. 44 hours is too much anyway, for me 12 hours would be the best.
Sent from my SGH-T959 using Tapatalk

Airplane mode sure does help too
Sent from my T959 using XDA App

It damn sure does...lol

I got 48hrs from the same rom, with wifi on constantly with skype. light to moderate use. Music at least 2+ hours twice in that span as well. Great rom. I chose not to UV or overclock so I have no SetCPU or anything installed, it's stock toxic with the 98 kickass script and v6. Really fast actually and no need for oc.

Penvision66 said:
I got 48hrs from the same rom, with wifi on constantly with skype. light to moderate use. Music at least 2+ hours twice in that span as well. Great rom. I chose not to UV or overclock so I have no SetCPU or anything installed, it's stock toxic with the 98 kickass script and v6. Really fast actually and no need for oc.
Click to expand...
Click to collapse
thats impossible with "moderate" use.
its light, and i mean like.. VERY light not even to the scale of being the actual light... so techinically your not using light, but using little light to no light at all.
P.S. my sentence includes 6 words "light"
now that i'm done with that bull****.
Please people posting their batteries as 40+ hours, PLEASE start using your phone. or just get a feature phone, honestly.
I, too, keep my phone on standby more than actual use, but i DO use it when i can. theres atleast 8 hours of music daily, constant wifi use, 24/7, and i get near 20 hours of battery life because i consider my use minimal moderate. At the end of the day, my battery life is usually at 40%, then i charge it again.
I'm on MIUI as well so battery life isn't perfect and i can deal with that.

xriderx66 said:
thats impossible with "moderate" use.
its light, and i mean like.. VERY light not even to the scale of being the actual light... so techinically your not using light, but using little light to no light at all.
P.S. my sentence includes 6 words "light"
now that i'm done with that bull****.
Click to expand...
Click to collapse
I SAID "light to moderate"... Also how can one judge what moderate is vs moderate with a guy who acts like a girl being on the phone all day texting and talking??? It's a ridiculous to even judge moderate or light vs someone else, because everyones concept of light to moderate are vastly different. So don't come at me like that bro.
Light to moderate (hence i didn't use strictly moderate) to me is at least 1 and a half hours on skype calls, at least an hour and a half on calls, a few texts on skype and sms, 10+ emails, a few show-offs lol, Wifi never turned off and skype always signed in, at least 4+ hours with music at the gym and a little after, a few random checks, a few market and web browses and maybe a short vid chat. That's light to moderate to me.
If you want to see less than light, like when I'm sleeping and checking my phone occasionally with wifi set to never turn off and skype signed in always I'll show you. It's been almost 12 hours since i was at full charge and unpluged and I am now at 94%. seems ridiculous I know and I thought so too but I ain't complaining. Stock battery as well. I'm no way saying this is light or what have you because it was idle for 90%+ Just an example of how deadly toxic 8 is with battery. And I do have apps. I dont usually play games though.

look at the attachment.That was after I downloaded 2 apps and tried them both lol and couldnt figure out how to screenshot. I'm done with this "bull****" now.

Once I see the cell standby is higher than the display I pretty much know how you use your phone.

No, you only know what you see. I am running Toxic8 also and am getting around 30+hours of real actual use, granted 8 of those are when I am sleeping, but still get strong use all day long.
Day in my battery.
Get up and go to work at 7am, listen to Iheartradio until 930-10
PowerAmp until 130 lunch with texts and email checks throughout.
130-2 XDA, random surfing
2-6 I listen to 2 different podcasts.
6-7 ride home on bus and listen to PowerAmp and check XDA again.
9-10 after kids in bed and I play a few games and check/clean some files in
Root Explorer.
Go to bed and then start over in the morning and finally plug in around 10 or 11 (lunchtime)
The cycle may shift a few hours here or there but it almost always the same. Oh and not sure if it is this ROM or not,but if I go into settings>about phone>status>batteryuse the picture shows that my display is at 75%, stand-by is 15% and phone idle is at 10% all +/- and that is clearly not the case. So you think that you see what my use is like but really you aren't.
I also use Juice Defender Plus which kills the radio/data traffic for an app-to-app basis and I have it set to kill radio/data while I am asleep.
I can post a screen shot if you like of the battery use (seeing isn't believing) or a shot of BetterBattery Stats (seeing is believing) if you like, but I am using my phone all day AND getting 30.

my vibrant hates toxic 8 for some reason. ultimate rom on the other hand has been very fast, responsive, and long lasting.

I prefer to actually use my phone for what I paid for it to do.....if I just want a phone ill go buy one out of a gumball machine or pick it out of a box of cracker jacks

iwillkillyou said:
That's great an all but it comes slow. Try multitasking or play a simple game. It will lag like crazy. 44 hours is too much anyway, for me 12 hours would be the best.
Sent from my SGH-T959 using Tapatalk
Click to expand...
Click to collapse
I was at 19 hours and 31 minutes using the Stock ROM with 41% battery left.
That's 33 hours if I had let it go all the way down with the same usage, and I definitely used it more than the OP does if that screen shot is any indication.
Didn't use airplane mode or anything.
I just uninstalled all apps I don't use and use a Black Background with only 3 home screens and a 30 second screen time-out.
WiFi used whenever I could, and I keep GPS on all the time now. Automatic screen brightness, too

The people who are being negative, what do YOU consider good use? I'm on trigger 3.2 final with bali 1.8.8 kernel, and my phone can get 24 hours with occasional use and still be at 50% battery, easily 24 hours with REAL use.
Real use includes calling for 1-2 hours, playing at least an hour of games, and just syncing off for apps I don't use constantly.. I don't have the phone underclocked when screen is off or undervolted any more than the kernel is set for.
How do I get that battery life? When the screen is off, it is in deep sleep. I get less than 1% battery drop per hour when it is in deep sleep. So basically unless I'm ACTUALLY using my phone, it isn't draining.
The part that impresses me is that I get easily 20+ hours of heavy use on the ORIGINAL battery(over a year and a half old). I know that battery must have lost some of its ability to charge.. I got my phone replaced by warranty, and the battery they included WILL NOT give as much battery life.. it makes me think that the problem with some people is a combination of a crap stock battery, and wake lock issues..

Wow this is some crazy stuff! I've been on GB for a long time now. I was just thinking the other day to flash back to 2.2 just for the lulz. But then along came the ICS port.
It seems I should try this out.
Sent from my lazy couch

THIS is what really light use looks like.. maybe an hour of calling, a few dozen texts, reading some news..
Sent from my SGH-T959 using XDA App

2.2 toxic is a great rom. i think it doesn't get enough love because of the GB and ICS options.
either way even 12hrs of battery life is pretty nice congrats

What I don't understand is:
1. How come it's on flight mode?
2. How come Display < Stand By?

Running on stock 2.2 with 3G, WiFi, Bluetooth, and GPS turned off, barely any apps installed so nothing started up in the background, and not recieving any calls all day my battery went from 100% to 93% in 13.5 hours. I estimate just shy of 60 hours of potential battery life.
But that was with a phone that wasn't being used at all; i.e. a paperweight. I could just turn the phone off and claim I had a bajillion hours of battery life.
FYI when I took the sim card out of my daughter's iPhone 3G, turned off wifi, and shut the screen off it lost about 1% PER DAY. That works out to a 3-month battery life (give or take) but again it's just a paper weight at that point.
In other words, if you're using your phone as an MP3 player for 2 hours a day, why shouldn't it get 44 hours of battery life?

Ok so i read all this hype about crazy8 so im trying it out now...
Damnit im very impressed....
I watched 2 movies complete played angry birds, on my phone for most the night and this morning when i got off work 9 1/2 hrs later i still had 35% battery life.
That is awsome to me,though i did not get 44 hrs due to i actually use my phone i will say im impressed,,,,i now no longer need to carry my 3 batteries and the external charger with me everywhere i go lol
I normaly go thru 2 battery changes a night.
Tonight i will run with all the script tweeks and so on...im excited to see the results then lol...although i will not run plane mode and undervolt it and all those lame tricks, actually may oc clock it a bit.
No more miui and cm7 for me lol bad ass battery life with everything working and snappy as hell....im at home with crazy 8

Very bad battery performance!

Hi all! I just get my galaxy tab 7.7 wifi only and I am very disapoited with the battery. It lost 1% each 4 minutes with just normal surfing ( screen brighness 30%) . By ipad 2 I lost 1% each 10 minutes and the screen is biger, brighter.!!! Any suggestion?
Ps: im stanby is ok. 2% for 10 hours.
Sent from my GT-P6810

Perhaps some background process? Try factory reset
Sent from my GT-P6800 using Tapatalk

just found this out a couple of minutes ago if you are using a search engine use bgoog.com aka black google it uses a black background so you can minimize use of the amoled screen and reduce battery consumption hope that helps you
black baground webpages tend to use less power than a white background
as for me battery life is better overall from my old galaxy tab p1000

Yep, I have a lot of black background applications as well and battery life is superb compared to my 6-month-old p1000, just be sure to properly cycle your battery from time to time to minimize battery degrade

My experience is that I get about 8.5 to 9 hours of screen time on a single charge with wifi turned on all the time. That's about one percent loss every five minutes.
I had heard that the iPad is rated as a ten hour battery but it seems that you have been very lucky and got a unit giving you nearly 17 hours of screen time. That's incredible and anything is going to seem like a disappointment after that.
If your unit is new you may find the battery life improves over time a little bit but I wouldn't expect much more than nine hours with wifi on all the time. The adverts claim ten hours and one review site managed twelve but I don't know if that is just looping a movie or if wifi was on at the same time.
Anyway, 8 hours is enough for me
Sent from my GT-P6800 using XDA App

Thank you all. I will try a factory reset then. My battery status now is 65% with 2hours 28 min screen on with only surfing web :-(
Anyone has factory test service running in background?
Sent from my GT-P6810

seVIIen said:
Thank you all. I will try a factory reset then. My battery status now is 65% with 2hours 28 min screen on with only surfing web :-(
Anyone has factory test service running in background?
Sent from my GT-P6810
Click to expand...
Click to collapse
i think you may have an app thats running in the backfround that doesnt exit even when not in use had the same problem before with my old p1000 i thought i had a lemon unit but the culprit was the a certain app forgot the name it was about a year ago you may want to use the samsung task manager and see if any app is running in the background or use a task manager on the market

and just to add, do turn off the background data on the settings, it's another power hog

I find it hard to believe that the iPad 2 can go for 17 hours of usage. Engadget's battery test says that their 7.7 lasted about 12 hours, 1.5 hours more than their iPad 2 (looping video, wifi on, screen at 50%, I seem to recall).
Also see settings> about device> battery use to see what's eating the charge. Normally, the lion's share goes to the screen. But games can use significant amount of charge too.
I've been able to about 10 hours of continuous usage (light browsing, email, xda, kindle, pdf reading on either repligo or mantano).
Sent from my GT-P6800 using xda premium

That's what i think too .
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Theory said:
I find it hard to believe that the iPad 2 can go for 17 hours of usage. Engadget's battery test says that their 7.7 lasted about 12 hours, 1.5 hours more than their iPad 2 (looping video, wifi on, screen at 50%, I seem to recall).
Also see settings> about device> battery use to see what's eating the charge. Normally, the lion's share goes to the screen. But games can use significant amount of charge too.
I've been able to about 10 hours of continuous usage (light browsing, email, xda, kindle, pdf reading on either repligo or mantano).
Sent from my GT-P6800 using xda premium
Click to expand...
Click to collapse
For video playback the Tab7.7 will have a longer battery life since it is using GPU decoding as compared to the Ipad2's SW only. But when it comes to surfing and everything else, generally for anything else apple devices can outlast samsung devices or andriod.

According to battery widget pro estimates, if I stick to reading on the kindle app, as I have been doing for the last couple of hours, I will be able to last another 18+ hours. Wifi is on, screen about 15%, background auto sync on. (Since it's a longish Neal Stephenson that I'm reading, I'm going to need that much time.)
Incidentally, I found battery widget pro very useful. Have it on each of my Android devices.
Sent from my GT-P6800 using xda premium

Aaawww, I feel so bummed to post this, cause I am otherwise absolutely in love with my galaxy tab 7.7, but I feel a bit iffy about the battery life aswell. I switched to galaxy tab from Asus Transformer TF101 and I actually feel like the battery on my previous tablet lasted waaaaaay more, even with the wifi switched on permanently. On my Galaxy Tab 7.7 3g I can easily lose 20% of battery power during a half an hour of browsing the internet on low brightness, with wifi, gps, bluetooth and background sync switched off...that is hardly the "phenomenal battery performance" mentioned in all those reviews. I use ADW launcher, not so many widgets, I dont even play music, games or video and still the battery will not last through the day at all...I mean..I only would use it for reading an ebook, browsing the web and facebooking 1 hour on a bus in a morning and another hour in the evening....but no chance...the battery wont last that long. It would exhaust the first 40% on my way to work, and come down to 30% during the day (when used very rarely). I can easily last the whole afternoon with switching the battery saver ON every time I am not using the tablet, but to resort to that, and to switch everything off and lowering the brighteness to miminum just to be able to browse internet for an hour and lose almost 50% of battery power by doing so, feels really desperate. I still dont want to believe I am the unlucky one to get a bad unit with a dogdy battery...what should I do to make sure tis not the case? Is there a test I can run to see for sure if I have the battery which drains the same way as the others or not??? Thanks in advance for any suggestions.

i personally have no battery problem with surfing internet . because i have use customized css in opera mobile, every page become black with white text.
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zoftdev said:
i personally have no battery problem with surfing internet . because i have use customized css in opera mobile, every page become black with white text.
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Click to expand...
Click to collapse
Ok thanks, but that does not really help..I just wanted to know if there is a way of knowing for sure (e.g. by running a certain test or something) that my battery is officialy flawed compared to the others in these units. All the reviews for this tablet mentioned an exceptional battery life and yet I am loosing almost 10% every 10 minutes of browsing (not playing video or music, so not a heavy use really) on the minimum brightness, with gps, wifi, bluetooth, background sync, vibrations, animations switched off...does not seem ok to me.

a_hadada said:
Ok thanks, but that does not really help..I just wanted to know if there is a way of knowing for sure (e.g. by running a certain test or something) that my battery is officialy flawed compared to the others in these units. All the reviews for this tablet mentioned an exceptional battery life and yet I am loosing almost 10% every 10 minutes of browsing (not playing video or music, so not a heavy use really) on the minimum brightness, with gps, wifi, bluetooth, background sync, vibrations, animations switched off...does not seem ok to me.
Click to expand...
Click to collapse
Install a battery monitoring app (e.g., Battery Monitor Widget Pro) so that you can track/log usage.
No, your numbers don't seem right.

Check what been taking up all the juices in setting-about-battery usage. I had similar problem previously when my exchange push mail was not working correctly and keep connecting to sever. Did a hard reset, everything is back top normal.
Sent from my GT-P6800 using XDA App

I dont have any battery life complaints yet as TBH, i dont really know what to expect from a 7.7 Inch screen with 5100mAH of battery, suffice to say that it out lasts an Ipad2 on anything but web browsing is already good enough for me.

My battery is very good, light years aheadof the Blackberry Suckbook that it replaced. I generally get a full day of heavy use with Wifi and 3g browsing, and two days of "normal" use.
Sent from my GT-P6800 using XDA App

a_hadada said:
Ok thanks, but that does not really help..I just wanted to know if there is a way of knowing for sure (e.g. by running a certain test or something) that my battery is officialy flawed compared to the others in these units. All the reviews for this tablet mentioned an exceptional battery life and yet I am loosing almost 10% every 10 minutes of browsing (not playing video or music, so not a heavy use really) on the minimum brightness, with gps, wifi, bluetooth, background sync, vibrations, animations switched off...does not seem ok to me.
Click to expand...
Click to collapse
if your tab is rooted and you know the system files you may want to install nobloat and remove system apps that you don't use tried it and lowered my actual ram use to 400 to 500+ and keeps my tab snappy be warned make backup before using just to be sure
and another thing always try to clear memory using task manager when your gonna let it standy i found it to use less battery than when many apps is running in the background when on standby hope that helps