Database Users

Battery life

Hello
Just got my blackstone, had it for a few days and i need to charge it every day, almost 2 times a day with moderate use. I turned off 3G, turned down the backlight. But still, if i just mess with it a little, in settings and so on, i can litteratly see the battery life getting lower. An hour ago it was 100%, now its on 83%. Any one who got some pointers on this?
Thanks.

I had a similar issue with mine, got it a couple of weeks ago with a stock Orange UK rom onboard.
Battery hasn't fully depleted, but I usually charge it everynight as it quick charges.
I've since put Dutty's 3.9XT Turbo rom on and battery life has been a lot better.
For example, charged overnight last night (from 59%) and am now at 90% after a few texts and emails. Normally I struggle to hold a 3G signal in my office so its alternating between G, 3G and H all the time, which also drains the battery, and have a push mail application running in the background.
I also charge it in the car in my cradle to and from work. Could probably get two days at a push if I needed to, but it would require charging in the car as well to do that.

Thanks. I flashed it with the energy rom, and the battery really sucks. What does actually the "H" mean, when that is in the status field? "E" is edge, G is 3g, but "H" is?

Try disabling 3g to see better battery life. I think my battry life is quite good without 3g. Running latest energy rom. H is hspda I think. Disable that also to check the affect on battery life.

Thanks. Ive done all that. 7 hours ago the battery was at 100%, now its at 15%. Ive texted 5 messages, and made 2 phonecalls. If i go into settings f.example, press a little, i can see the % gone down a few. Something must seriously be wrong.

bthelastman said:
Thanks. Ive done all that. 7 hours ago the battery was at 100%, now its at 15%. Ive texted 5 messages, and made 2 phonecalls. If i go into settings f.example, press a little, i can see the % gone down a few. Something must seriously be wrong.
Click to expand...
Click to collapse
Yeah, somethings up with it. To compare I took mine off the charger 7 hours ago sent 4 emails, used gps 3 times, browsed several sites for a total of about 45 min., made two short calls and I'm down to 75%. Thats all on edge.

bthelastman said:
Thanks. Ive done all that. 7 hours ago the battery was at 100%, now its at 15%. Ive texted 5 messages, and made 2 phonecalls. If i go into settings f.example, press a little, i can see the % gone down a few. Something must seriously be wrong.
Click to expand...
Click to collapse
Definitely sounds like a more serious issue.
I have 3G and HSDPA on all the time and still get through about 25% battery during most of the day, with a few texts, a call or two and some email/browsing etc.
I also make sure that I close any other applications that I've finished with to calm memory and processor usage down.

Thanks. Yes, it sounds like an issue. Wish i had you guys battery. I can litteratly see the % go down, if i go to settings, press something go back and so on. Bought a new 1350mah battery on ebay, hope that would do the trick. Its bugging me sooo much, breaking swet becouse of it, lol.

Did you also turn off bluetooth and wireless? I get three days out of mine without 3G.

Yeah, all that stuff is off. Only edge is on. The battery must be faulty, thats the only thing i can think of. Example, made a phonecall now for 5 minutes, it dropped 10% on the battery.

bthelastman said:
Yeah, all that stuff is off. Only edge is on. The battery must be faulty, thats the only thing i can think of. Example, made a phonecall now for 5 minutes, it dropped 10% on the battery.
Click to expand...
Click to collapse
bthelastman,
Try these following steps to recalibrate your battery.
1) Turn off the phone.
2) Let it charge overnight and don't unplug it.
3) In the morning, use the phone till it is down to 10% (Don't go lower than this number).
4) Turn off the phone, and do a full-charge again.
Repeat these steps 2 ~ 3 times and see if the battery gets better. Sometimes, it is not that the battery is bad, but merely the calibration is a little off. Always try to charge your phone when it is turned off, it keeps the accuracy of the battery lasting much longer without having to do a full-discharge.
Let us know how this works out for you.
Cheers.
Cheers.

Thank you PoisonWolf, i will test this out. Thanks.

PoisonWolf said:
bthelastman,
Try these following steps to recalibrate your battery.
1) Turn off the phone.
2) Let it charge overnight and don't unplug it.
3) In the morning, use the phone till it is down to 10% (Don't go lower than this number).
4) Turn off the phone, and do a full-charge again.
Repeat these steps 2 ~ 3 times and see if the battery gets better. Sometimes, it is not that the battery is bad, but merely the calibration is a little off. Always try to charge your phone when it is turned off, it keeps the accuracy of the battery lasting much longer without having to do a full-discharge.
Let us know how this works out for you.
Cheers.
Cheers.
Click to expand...
Click to collapse
PoisonWolf mate these techniques used to work on old battery but the new lithium batteries don't need these manual calibration process...

akash_nu said:
PoisonWolf mate these techniques used to work on old battery but the new lithium batteries don't need these manual calibration process...
Click to expand...
Click to collapse
akash_nu,
I beg to disagree. What I am saying is, sometimes, the battery in itself can hold the right amount of charge, but the onboard motherboard thinks it is not holding the right amount of charge. The full-discharge helps correct this issue.
If you don't believe me, keep charging your TouchHD whenever it is at 80 ~ 90% for a couple of months and you'll notice a "drop" in how fast your battery drains.
Cheers.

I definitely agree with this.
My Touch HD kept dying after a couple of hours, even when charging it over night. So I turned my phone off and charged it over night with a wall charger (instead of USB) and then it lasted for 48 hours with the same usage.
I think the battery tells the phone it is fully charged even when it is not. So like you say, it just needs recalibrating.

Not sure why the post appeared twice, I only submitted once!

Hi,
The button to the top wright of the phone, to close apps, the screwdriver icon says 59%. I guess that means running 59% of its power of whatever?
Shouldnt it say like 0%, since no apps are running?
Thanks.

After eight months and having my battery give me 2 minutes of talktime on a four hour charge, Orange UK have replaced it for me FOC.

bthelastman said:
Hi,
The button to the top wright of the phone, to close apps, the screwdriver icon says 59%. I guess that means running 59% of its power of whatever?
Shouldnt it say like 0%, since no apps are running?
Thanks.
Click to expand...
Click to collapse
That % shows the amount of free RAM your device has, not how much power it is consuming..

Not sure why you are having this problem, I use BB Connect all day at work and am on the phone for several hours, I don't have 3G in the US but notice if I have WiFI on it drains the battery fast.
Are you sure you don't have a program running that is always looking for the internet? You could try HD tweaks and turn off the internet all together and see if that helps.

Something's not right with my battery, don't you think?

Ok, guys look... I know there are lots of variables, but I get back from work, it's been 12 hours since my 100% charge, I'm at 26%. I get home, I charge my phone. It's back up to 100% in about 2 hours. I try some weather widgets on my phone, answer 3 emails quickly, I'm down to 83%. Something must be up, right?

I have notice this happen and its because the phone reads the battery is at 100 but you still need to let it charge longer for it to hold the charge. I suggest a full charge then kill it until it shuts off. Then let it charge while off until the LED turns green and maybe for a little time after that. Do that a few times and you should see some improvement.

Ok, well perhaps I'll have to try that then. Can the battery be reconditioned? Do these batteries have memory?

How long have you had the phone? Battery life should improve after having the phone for 5-10 days.

Like what joe333x stated.When I first got my phone I charged it up to 100% and turned it off until the led turned green for about 30mins. After that I get about 16hrs of battery life.
-------------------------------------
Sent via the XDA Tapatalk App

I've had the phone since last Thursday night (not yesterday) and I know that two times, I unplugged when it was orange. Guess I should have left it.
The other thing possibly battery related is that right now for example, I have thhe little cycling arrows icon on my taskbar. I am 99% positive that I have nothing set up to be syncing for THIS long. It's been on all day. I unplugged at 7:45AM, it's now 11:21AM, I've done maybe 15 text messages, and the phone is at 77%. You can see how I might find this frustrating.

tinpanalley said:
I've had the phone since last Thursday night (not yesterday) and I know that two times, I unplugged when it was orange. Guess I should have left it.
The other thing possibly battery related is that right now for example, I have thhe little cycling arrows icon on my taskbar. I am 99% positive that I have nothing set up to be syncing for THIS long. It's been on all day. I unplugged at 7:45AM, it's now 11:21AM, I've done maybe 15 text messages, and the phone is at 77%. You can see how I might find this frustrating.
Click to expand...
Click to collapse
i understand. i'm having the same problem. my battery died on me after 5hrs of usage, or complete setup, i should say. i just got off the phone w/ t-mo support in hopes of getting a replacement battery. no go. the operator said her phone dies in 2-3hrs, so i should be happy w/ 5. opted me to buy a spare battery for $50. i am very displeased.

you guys have something running in the background for sure ..go into your acocunts and sync the very least turn off the tmo garbage if not all of them except for google.. If you see my thread I've gone over36 hours on one charge

I've got all of them off, even weather cause I'm using Weatherbug.
But I do have background data on. But I don't wanna be completely disconnected to my data. What exactly does background data run?

turboyo said:
you guys have something running in the background for sure ..go into your acocunts and sync the very least turn off the tmo garbage if not all of them except for google.. If you see my thread I've gone over36 hours on one charge
Click to expand...
Click to collapse
my 5hr kill is after doing a factory reset. only thing set to sync is google. no facebook or twitter accounts are linked. display is on the minimum. screen timeout is 15sec. no wifi, bluetooth, or gps. so i'm at a lost.
are you still experiencing that kind of life?

Same here. No wifi, no bluetooth, no Google, no GPS. All I have even remotely "automated" are my emails, my text message data, my freakin phone. That's it. It's gotta be the battery charging thing I think because there's nothing else draining my battery and yet the little sync circular arrows are still on my task bar.
Oh, and by the way... since my message at around 11:15 or so, I'm now down from 77 to 70 per cent. 7 percent in an hour without doing anything.

The things like tmobile and weather are set to sync automatically from the factory (meaning theyre set after a wipe) Have you guys gone into the settings and made sure you turned them off??

I have, yes. They have been off all week. 12 hours usually gets me down to about 26 per cent. That's a 6 day average, moderate use.

that doesnt sound too bad for 12 hours.. have you tried killing it a few times and fully recharging?

my thing is, i find it quite unpleasant that i'm having to disable all the basic or advertised functions of my phone just to have the same, if not, worse battery life? i find myself not even wanting to answer some calls because of the thought that one 5min conversation will dock my battery more than 5%.

It is incredibly ridiculous to have to be constantly concerned that if I do a search on the internet, that my phone may die earlier than I can afford. Additionally, I don't wanna be one of those annoying people running around all over the place with an AC adapter trying to plug my phone in every place I go to. Nor do I think I should have to keep a USB cable handy for when I'm at work. Plus, what's the deal with the batteries, do they or do they not have a memory that requires them to be fully charged and then fully discharged?

Hey guys,
I just joined because of this specific issue myself. My girl has the mytouch 3G and she could go for almost TWO DAYS without a charge. I leave my house at 7AM every morning, and return about 7PM. By the time I get home, I've maybe texted a few people, made one or two phone calls, and my battery is sub 30%. I've turned off wifi, bluetooth, and the display is just about as dark as it can go.
I just turned off the background data option, and had to manually go into all the accounts and make sure the sync was also not running. We'll see what happens.
Does anyone know if there is a 2.2 FW for this phone we can use yet? I've read up on user created FW (like cyanogen) because they cut out all the useless crap most of us will never use.

tinpanalley said:
I've had the phone since last Thursday night (not yesterday) and I know that two times, I unplugged when it was orange. Guess I should have left it.
The other thing possibly battery related is that right now for example, I have thhe little cycling arrows icon on my taskbar. I am 99% positive that I have nothing set up to be syncing for THIS long. It's been on all day. I unplugged at 7:45AM, it's now 11:21AM, I've done maybe 15 text messages, and the phone is at 77%. You can see how I might find this frustrating.
Click to expand...
Click to collapse
I noticed this too. Its due to that fact that from default there are a bunch of things that sync now not just your gmail account. Go into settings and disable all the unneeded things and you wont see it as much.

poetik517 said:
my thing is, i find it quite unpleasant that i'm having to disable all the basic or advertised functions of my phone just to have the same, if not, worse battery life? i find myself not even wanting to answer some calls because of the thought that one 5min conversation will dock my battery more than 5%.
Click to expand...
Click to collapse
I have had these issues before and it was almost always due to somthing in the background.
but letting the battery drain till it shuts down then charge 5+ hours then drain again, always going till it dies is the key, it will run a long time after it says it is done...
bhang

bhang said:
I have had these issues before and it was almost always due to somthing in the background.
but letting the battery drain till it shuts down then charge 5+ hours then drain again, always going till it dies is the key, it will run a long time after it says it is done...
bhang
Click to expand...
Click to collapse
i'm continuing that "conditioning" now. it died yesterday after 5hrs fresh from a factory reset. i charged it for 8hrs. i will perform another day of drainage and overcharge today.

battery drained out.....any idea

for some odd reason my battery was drained out very fast, i mean fast....
i thought it was my battery but i guess its my phone....cuz i bought a new battery n it was at 60% n less than 3 min it was down to 6%....
is there a way to fix this or is my phone broken...
any help would be good....
thank you!!!

Enter *#*#4636#*#* in the dialpad, that brings you to a service menu. There, go to Battery History and select Partial wake usage. That shows you if you have some app installed that prevents the phone from sleeping.
Also, the battery needs to go through a couple of full charge-discharge cycles before it reaches it full capacity.
Hope that helps!

Was it hot?
Hi,
To dissipate that amount of energy in that time would make the unit very hot indeed.
Is the unit getting hot?
If not, then the energy wasn’t really there and it’s likely your battery is damaged/faulty and needs replacement.
Regards,
Paul.

The best advice i can give you is to find a widget that disables your data connection.
I used to have major battery drain. ie: Right after a charge, i only got 97%. By 10am, with almost no usage, im on around 68%.
Now, with data disabled (when not in use), i am still on 95% since i took it off charge at about 12am in the morning!

setfree said:
The best advice i can give you is to find a widget that disables your data connection.
I used to have major battery drain. ie: Right after a charge, i only got 97%. By 10am, with almost no usage, im on around 68%.
Now, with data disabled (when not in use), i am still on 95% since i took it off charge at about 12am in the morning!
Click to expand...
Click to collapse
Can I ask you what widget you use for that? I'm facing the same problem: 94% right after recharge and rapid discharge after that.

Try "Data on demand", worked for me.
P.

data on demand is brilliant.. but I don't think that is the problem that the OP has experienced - no amount of data use would cause the battery to drain that quickly.. it's likely to be 1 of 2 things..
1. Faulty battery.
2. faulty app which is battering the processor and using 3g/wifi at the same time..

no the battery is not hot....my phone was working fine this 3 day ago....n now with the new battery is still the same.......
i also turn of everything on my phone n restart everything...with 0% this morning ....with my phone n now im back home im still at 23%.......is it virus?...but i scan my phone with this app from the market n its fine........

Timescape and Mediascape might be the cause
Hi, I had the same problem. I had to charge my phone three or four times a day. I read in a thread here that some people removed Timescape and got amazing improvements. I removed Timescape, Mediascape and other applications I don't need. Your phone must be rooted for removing these applications.
This night my battery dropped 3% in six hours. I now charge once a day and is happy with that.

Helps to mention to them any side effects of removing timescape n so forth..
Sent from my rooted 026 X10i using swype via XDA!!

Yeah, removing timescape and mediascape is a good idea, i also removed the phone dialer, and the browser because it was draining lots of battery, and also removed parts of the Android UI but figured it was still using some battery, so i now use the shell on minimum screen luminosity and always on plane mode !

Yes, you can mock about it, but both Timescape and Mediascape got replacment apps which are actually way more usable and gives me more than just a fancy user interface.
That is one of the good things about Android. I am not locked to any application.

Sorry to take over here but whats a good replacement for timescape? I've tried many phonebook apps and they all look horrible.
I would really like the HTC sense phoonebook any way i can get that?
Sent from my X10i using XDA Apptr

I don't know about that but theres apps such as acontacts, takephone (something like that) n quickcall!
Sent from my rooted 026 X10i using swype via XDA!!

It happens to me once, from 92% to 36% in just under 6 minutes. Then draining very fast after that. I removed one application I installed (can't remember the exact name) and rebooted and it never happen again...

phone is dead now..........
wont charge!!!!
this suckx!!!!
wast of money!!!!!!

You need to take it back buddy - it's obviously faulty.

Dear all members,
I plug in the phone yesterday for charging and probably due to the charger was not plugged into the socket probably, it is not charging.
To my surprise, when I wake up in the morning, the battery was drained and shut off.
I try to charge the battery up but the charging seems a little slow now, is the battery faulty?
I can feel the back of the phone was hot though.

Definitely something wrong with my battery, I have been charging from morning till now and the battery never charges up to 22%, when it reaches 22%, it will drain out slowly even the socket is still connected.
I will have to bring my phone down for them to check.

beno1 said:
Enter *#*#4636#*#* in the dialpad, that brings you to a service menu. There, go to Battery History and select Partial wake usage. That shows you if you have some app installed that prevents the phone from sleeping..
Hope that helps!
Click to expand...
Click to collapse
Is there any way to disable those apps while the phone is sleeping?

[Battery Stats] I didn't bring my phone to work today

I had everything turned off. No email, no sync, no wifi, no gps, nothing. I fully charged the battery and unplugged it before I left. Display was never turned on. I wanted to see a completely isolated battery test. The only applications I had active according to my task manager was Launcher Pro.
Time on 10 hours 20 minutes
Battery life left 60%
Battery used 40%
Cell Standby - 40%
Phone Idle - 30%
Android System 20%
Calls (1 missed call) 5%
Display 3%
Maps 2% (Why does maps show up?)
Again this is with absolutely 0 use or syncing going on. Left phone at home, turned on and immediately checked stats when I got back from work.
According to this small test I can't even last a day on a full charge even if I left it completely alone.
Thoughts?

Running stock JI6

Holy stewart Gilligan Griffin.
Why does everyone need to make a thread for personalized information regarding their battery life?!?
I had a g1 n then mytouch n I've never seen such whining over battery life. If I see one more battery thread.......
Sent from my SGH-T959 using XDA App

at least your reply was helpful.

sj_martin said:
Running stock JI6
Click to expand...
Click to collapse
In 1.5 day of standby with every radio off and no sim, my phone only lost about 5% with stock JI6.

I think it is a cool idea. I find that 5% usage for one missed call is very bad. I have really suspected that voice calls kill this battery and that seems to add evidence. 5% for a missed call? That is messed up.

I think this is the aspect of battery life that doesn't get addressed enough: drain during standby. Of course everyone expects to lose some power while the display is on and syncing/other processes are running--but what about when the phone is left untouched? Here are 3 ideas:
3g is a notorious battery drain even when the phone is not being used--use 2g instead.
Freeze or uninstall media hub and other running processes that attempt to run/connect to servers in the background. I removed dmservice, media hub, and all drm processes and this seemed to be helpful.
Use a custom rom--these appear to hold power in standby better than stock roms do.

grennis said:
I think it is a cool idea. I find that 5% usage for one missed call is very bad. I have really suspected that voice calls kill this battery and that seems to add evidence. 5% for a missed call? That is messed up.
Click to expand...
Click to collapse
To add further detail usage time was 45 seconds for the missed call.

sj_martin said:
I had everything turned off. No email, no sync, no wifi, no gps, nothing. I fully charged the battery and unplugged it before I left. Display was never turned on. I wanted to see a completely isolated battery test. The only applications I had active according to my task manager was Launcher Pro.
Time on 10 hours 20 minutes
Battery life left 60%
Battery used 40%
Cell Standby - 40%
Phone Idle - 30%
Android System 20%
Calls (1 missed call) 5%
Display 3%
Maps 2% (Why does maps show up?)
Again this is with absolutely 0 use or syncing going on. Left phone at home, turned on and immediately checked stats when I got back from work.
According to this small test I can't even last a day on a full charge even if I left it completely alone.
Thoughts?
Click to expand...
Click to collapse
Cell Standby indicates that there is an activity that polls something from the network.
if you are so concerned about what it might be, you can see when and how much data is being used by going to your TMO account online and check for the data usage - one of the good features TMO put in place is actually tell you when your phone connected to get what amount of data over the data connection, does not tell you what it was doing though.

Yeah, something is going very wrong in your phone. When my phone is on standby with just 2G on it drains less than 1% per hour. I would definitely recommend getting rid of the drm service and media hub (and Daily Briefing). I also use Autostarts to keep all kinds of random programs from starting at inappropriate times (Really Slacker, does your app need to launch every time the time zone changes?)

Kubernetes said:
I would definitely recommend getting rid of the drm service
Click to expand...
Click to collapse
It is.... DrmUA.apk?

According to Samsung the phone should last 450 hours in standby mode...
Anyway, yeah, I'd be curious to see the same test done with 2g only.

ackattacker said:
According to Samsung the phone should last 450 hours in standby mode...
Anyway, yeah, I'd be curious to see the same test done with 2g only.
Click to expand...
Click to collapse
450 hours rofl.

Looks like i'm going to go off stock and try out some roms now. I assume bionix 1.9 is the new hotness out there? Going to flash and try the same test again and post results.

ackattacker said:
According to Samsung the phone should last 450 hours in standby mode...
Click to expand...
Click to collapse
I wonder if Samsung's definition of "standby mode" is what the rest of us call "off".

I've never had any kind of batt life with this phone...charge everday overnight...start work at 8, use here and there for navi (around 10 mins max, maybe 2x a day) about 30 min avg talk...and mp3 player...get home by 4 and always at 30% or (most often ) less...have had stock/ bionix roms, never changed, no matter what build....it's pathetic..called tmo, they said there are no known issues with batt on this phone...wow...do a google search on it..anyways, they are sending out a new batt..I hope I just got a bad one...seems very random tho, some ppl have all radios on ,screen all the way up and get 10+ hrs...if i left my screen on (say navi on) for more then an hour straight I'd be out of battery..very weird..praying new batt is better...

copied from team whiskey site:
Code:
Battery Conditioning
Does it seem like youre just not getting the battery life you should from your phone? Do all your other friends keep going while you slowly putter into a shutdown? Well pout no more! Simply follow these steps to clear your batter information from the phone and your phone will act better then new! :)
1. Charge phone completely, leave plugged into power
2. Boot into recovery
3. Wipe battery stats
4. Reboot to normal
5. Remove power cable
6. Drain that sucker all the way
7. Recharge fully
8. Rejoice!"

I turned my phone off today. Then I left the house. When I got back the battery was glad to see me. Seriously, I've read just about everyone and almost started my own battery disturbance thread. I've come up with a new thought at least for me. I don't care any more. I have electricity. I have a spare battery and a charger. If my phone wants to last a whole day. Yay! If I use it more because of some game with angry birds or cards or dice, great. I've reached that Mark Twain moment somewhat tweaked when he said,
“Age is an issue of mind over matter. If you don't mind, it doesn't matter.”
I'll tweak it with the last 27% of battery left in my feeble vibrant to:
"battery is an issue of mind over matter. If you don't mind, it won't matter".
Enough already I say! Lets spare the air. Batteries are meant to be used
Back to the regular reading of all the battery threads now.

I think I had the same issue as you. Cell standby was the biggest drain. When you tap on that, do you see 50% time without signal? If that's the case, this seems to be a bug in Android which was somehow introduced in JI6. The best solution I've found so far is after every boot to put your phone in flight mode for a few seconds and back. This fixes the radio glitch, your time without signal should go down way under 50%, and battery drain should stop. Hope that helps.

You should recondition your battery:
Fully charge
Reboot into recovery wipe battery information
Reboot into OS
Unplug power cable
Let battery FULLY drain (do not plug in until fully dead)
FULLY charge battery (do not unplug until fully charged)
This reconditioning should be done after every ROM flash.

[Q] Battery issues

Ye, my battery just went from 48% to 3% in about 3 minutes. Does anyone have any idea why this is?

Same problem here. From about 43 % down to 7 % while it started to charge the battery with the original charger. Afterwards the Tab didn´t charge at all. Battery drained and got very warm.
I Called Vodafone and was told i have to send the Tab in for fixing. I hate waiting for the tablet 3 weeks.
Update: After 2 hrs. of waiting the Tab cooled down and i was able to start it again. Did a factory reset and was able to charge again with the wall mount charger.

Just wanted to bump this as my battery life is miserable and it discharges really fast in standby...
My HTC desire has been on for 52 hours, used for a lot of stuff and is at 20% battery.
The Tab charges to 100%, I unplug it at night and in the morning it has lost approx 10%, I leave it a few more hours and it't down to around 60%. This is with no use and no apps running!
I've tried killing apps or leaving them in memory and it doesn't seem to make much difference. I also use setcpu and have a profile where the CPU speed decreases when in standby to conserve battery?!
If I charge to 100% and use it constantly, I get fair life out of it maybe 4-6 hours of light use - some streaming over wifi, web surfing, kindle, sudoku etc. If I use it occasionally or heavily though, it dies very quick and if I leave it at about 40% on the evening, it's generally dead in the morning.
Why does it discharge so fast in standby??

Check to see if it continually searching for a signal. I've noticed that mine loses a lot of power constantly searching for a signal, cellular and wifi. So, I used airplane mode to conserve power. Remember that it syncs to different services that require it to periodically download data. That may be your issue.
Sent from my SCH-I800 using XDA App

Thanks Chuck, I use it in airplane mode all the time and only use web over wifi (bought unconnected in the UK). Would it still be syncing for email etc? I didn't think it could turn on wifi and sync itself but only when I turn wifi on. I always turn wifi off when not in use. I had problems with widgetlocker asking for superuser permission quite often and that killed the battery quicker so I removed that until it's fixed and saw an improvement.
I'm not seeing the times that other people are though, losing at least 10% overnight and there's nothing really running.
I installed battery doctor and the times it quotes are high for different types of usage and nowhere near what I'm getting.
I'll make sure email and calendar are set to manual update, adjust brightness etc and see what happens. It seemed better when I first got it so perhaps an app is draining it? I installed system panel to monitor this but it's hard to see what is actually draining it, any recommendations anyone???
Quite disappointed at the moment, ipads barely drop 1% overnight and I'd rather not have to turn it off to conserve battery when it should maintain it in standby...

Check the task manager and see what application are running. Also you can go in settings- about device - battery use to see if a specific application is using your battery out of normal. Also , the display is generally the battery hog, you may have set it to a super high level. One last thing you may have the buggy 3d gallery app, and it will show in the battery usage.
P_

this is an interesting problem. its very similar to the Apple Macbook Air.
The Macbook Air was very thin - very nice looking - however it needed to depend on wifi to do most things.
the association i am trying to build here is this: the Tab needs a bluethooth headset so you dont get all your calls broad-casted over speakers and that could drain the battery a lot.
for me the battery drainage didnt seem so bad and its been on for the last 36 or so hours. the battery icon didnt look like it moved so much and i was impressed considering this thing had a gigantic battery. then i loaded up a utility that read the battery and said i had 59% so my jaw dropped. not only is the battery indicator wrong there maybe rogue processes casuing the battery drainage. and this is on 2.2 which is supposed to be somewhat battery efficient.
i dont know - frustration is what i am all about here with this thing. it seems that every time i buy a new android device i want to move to another android device. no one is getting the damn thing correctly setup.

Am at work right Now, Charged the tab overnight, just few minutes ago my battery said 60% left and now the tab is completely dead, wont turn on, I ll wait until i get home to charge, fingers crossed.

Change the battery...
Sent from my HTC HD2 using XDA App

shubh.27hd2 said:
Change the battery...
Sent from my HTC HD2 using XDA App
Click to expand...
Click to collapse
its been charging for 2 hours now and battery is not even warm to the touch plus no power yet... if charging is what you intended....

more than 3 hours of charging and counting and still no sign of life...This device is just 8 days old today from Brand new...

mudstuff said:
Just wanted to bump this as my battery life is miserable and it discharges really fast in standby...
My HTC desire has been on for 52 hours, used for a lot of stuff and is at 20% battery.
The Tab charges to 100%, I unplug it at night and in the morning it has lost approx 10%, I leave it a few more hours and it't down to around 60%. This is with no use and no apps running!
I've tried killing apps or leaving them in memory and it doesn't seem to make much difference. I also use setcpu and have a profile where the CPU speed decreases when in standby to conserve battery?!
If I charge to 100% and use it constantly, I get fair life out of it maybe 4-6 hours of light use - some streaming over wifi, web surfing, kindle, sudoku etc. If I use it occasionally or heavily though, it dies very quick and if I leave it at about 40% on the evening, it's generally dead in the morning.
Why does it discharge so fast in standby??
Click to expand...
Click to collapse
I am experiencing the same thing. Tab on flight mode and charged to 100% overnight. Unplugged at 9am, still on flight mode with no apps running, and it is 88% at 2pm.
12% drop in 5 hours with no usage whatsoever is way too much imo, comparing let say to my HD2, even not in flight mode. Wonder if they have a bad batch of battery for certain tabs........

Just wanna report back after my last post. When the percentage was dropped to 85%, I did a reboot. And guess what, now it displays 95% !!!!!!
5% drop from the morning til now in flight mode seems right and okay. Does it mean the tab is miscalculating the percent left?
PS.
I have been following the voltage in Spare parts this morning. All settings are the same (no apps opened, same screen brightness and in flight mode. Only turn on to record voltage)
94% - 4087mV
91% - 4081mV
88% - 4075mV
85% - 4067mV
But then after the reboot
95% - 4040mV
Man, I am not sure whats going on here........

shinji21 said:
Just wanna report back after my last post. When the percentage was dropped to 85%, I did a reboot. And guess what, now it displays 95% !!!!!!
5% drop from the morning til now in flight mode seems right and okay. Does it mean the tab is miscalculating the percent left?
PS.
I have been following the voltage in Spare parts this morning. All settings are the same (no apps opened, same screen brightness and in flight mode. Only turn on to record voltage)
94% - 4087mV
91% - 4081mV
88% - 4075mV
85% - 4067mV
But then after the reboot
95% - 4040mV
Man, I am not sure whats going on here........
Click to expand...
Click to collapse
let me jump in here again and share a similar deli-ma i had with my X10i.
while i was messing around with some custom roms i decided to stick to one that looked somewhat nice. well the funny thing is the battery indicator would always display 100% and for about 4 hours it would drop ever so slightly. then i removed the battery and put it back in -- the battery indicator showed 0% and i got a red light flashing ....
after screwing around with it for a bit i re-flashed the stock firmware from Sony-Ericsson and magically my battery meter and my battery worked fine.
so to sum up -- it maybe a software issue like the one i had on my SE X10i above?