CM7 and Battery Woes - myTouch 4G General

I will tell ya, I have been extremely disappointed by my new MT4G's battery since I got it just before Christmas.
If I unplug at 7am to work (I work at home) I can bring it in, not use it all morning, and by 2 pm I was looking at 70% battery with almost zero use? If I used the phone at all, I'd be looking at charging it by 3 pm.
Needless to say, if I went to sleep, I HAD to have the thing plugged in to charge as it was draining very fast while doing nothing.
Never really could figure out why, but yesterday mid day I installed Cyanogenmod 7 on a full charge and it's 7:53 am today (I didn't plug my phone in to charge last night) and I'm still at 50%.
No juice defender, nothing, didn't plug it in (I forgot, and when that usually happens my alarm doesn't go off because it's dead).
If you're having massive battery issues.......try CM7...I had tried everything on glacier roms to get better life. My phone would randomly wake up...now it doesn't.
Anyone have a similar experience moving to CM Roms?

That sounds like it might be worth checking out, but I will wait until the official cm7 release is out.
I am using setcpu to underclock my phone while the display is off. I unplug at around 8 AM, and I can get to 1 or 2 pm with 98-99% of my battery remaining with no use. I went to sleep last night around 12 with 29% left, and I woke up at around 9 with about 27% left. I should also add that I spent a pretty solid amount of time yesterday browsing the internet and playing angry birds, so I was pretty pumped to have that kind of battery left at the end of the day.

beelbeel said:
That sounds like it might be worth checking out, but I will wait until the official cm7 release is out.
I am using setcpu to underclock my phone while the display is off. I unplug at around 8 AM, and I can get to 1 or 2 pm with 98-99% of my battery remaining with no use. I went to sleep last night around 12 with 29% left, and I woke up at around 9 with about 27% left. I should also add that I spent a pretty solid amount of time yesterday browsing the internet and playing angry birds, so I was pretty pumped to have that kind of battery left at the end of the day.
Click to expand...
Click to collapse
what's weird is I could play a game a lot, or do something considered heavy use and I really wouldn't get a ton of battery drain. It would drain a lot when I seemingly wouldn't do anything.
I too have setCPU profiles, and had to use JuiceDefender to even make it to the evening with light use.
I've had 4 different Android phones now, this was the only one that acted like this (all were battery hogs, but nothing on this level...Droid, N1, Vibrant, MT4G)
as far as waiting on CM7.....I didn't see any reason to wait. Everything seems to work very great with the newest builds and I don't really have many/any issues.
Was worth the switch for me to fix the battery issues with the stock I was having.
I STILL think it had to be a wake issue...ie, the phone waking a bunch during the night and turning the screen on/processes on. I haven't noticed CM7 randomly wake my phone once since I changed.
of course, it could be something kernel related too

Related

Battery life?

I just got the Captivate on Sunday so maybe it needs some time to settle in or whatnot, but I thought I'd make a post about its battery life. How's everyones experience with the battery so far? I love this phone to death, but it seems like the battery life sucks so far. It also seems to take a really really long time to charge up.
I have the display at 11% and haven't done anything with the phone at all today and I'm already at 80%.
3h 12m since unplugged. Says what's using my battery is:
Display: 35%
Cell Standby: 22%
Phone Idle: 15%
Bezier - Live Wallpaper: 7%
Android System: 6%
Advanced Taskkiller Free: 5%
Alarm Clock Plus: 4%
Android OS: 3%
I have GPS, Wifi, Bluetooth all off. Autobrightness is off, I just have it set to 11%.
80% after 3 hours of doing absolutely nothing to the phone doesn't seem right. I'm killing apps I'm not using and the only thing more I could really do is kill the live wall paper but it doesn't seem to be taking that much battery life and I really like it.
Any thoughts?
Also it seems to take like an hour and a half to get like 15% charge when plugged into an outlet. It just takes absolutely forever to charge it.
Yea my battery life is also draining really fast. It tells me that the screen is using 73% of the battery though....
Any thoughts?
Sent from my SAMSUNG-SGH-I897 using XDA App
bb12489 said:
Yea my battery life is also draining really fast. It tells me that the screen is using 73% of the battery though....
Any thoughts?
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
When I first got it I used it till it died pretty much and then charged it all the way back to full. Wasn't sure if this was necessary or not, but I'm just pointing out that I did it. I have obviously been using it a bunch when I first got it, but now I'm not, trying to see what kind of battery life I have. I haven't done anything except look at the phone a couple times this morning. Haven't even run an app.
Yea same here. Im doing the exact Same thing. I unplugged at like 8am and right now im at 80%
Sent from my SAMSUNG-SGH-I897 using XDA App
I unplugged my phone about 3 hours ago and I am at 93% battery life.
I am using Juice Defender, and I kill all apps that I don't want open.
I actually think this phone has great battery life. It typically takes a few charge cycles for the battery to settle in. I abuse the phone a lot and it lasts all day for me. Compared to my tilt2 this thing has much better battery. I would suggest that you guys run the battery all the way down, and let it charge fully overnight a few days in a row, and you should see and increase in performance.
Current Battery: 74% Unplugged for 5hrs 14 minutes
Display: 41%
voice calls: 37%
standby:11%
Idle:7%
android system: 3%
madjsp said:
I unplugged my phone about 3 hours ago and I am at 93% battery life.
I am using Juice Defender, and I kill all apps that I don't want open.
Click to expand...
Click to collapse
I just installed juicedefender. Looks interesting. We'll see if it makes a difference.
Running down the battery to about 5 or 10 percent and then charging all the way up several times definitely helps. Its been almost eleven hrs since I unplugged and I'm at 73%
Let it run down and then charge all the way up several times. Worked with my phone.
Sent from my SAMSUNG-SGH-I897 using XDA App
My Battery Life on my bold was better but then it is a different phone and the battery was almost 2 years old but still worked great. Now my battery is at 22% and when I left a 8:50 am PDT, I pulled it off of charge, and I am playing music to intentionally get the battery down to 5% or less before I charge it. Not bad considering, I am constantly doing a ton of stuff, browsing, playing games, playing music the first time, and running google earth/maps as well as you tube videos.
Cheers,
Charlie
ive been unplugged for 2 hours and 27 minutes and im down to 67%
Haven't done much with the phone all day. Installed juicedefender. Left it on easy settings. Not sure how much it's helping so far, if anything. This is my current breakdown: 8h, 48m since unplugged... 35% battery remaining. Display: 45%, cell standby: 16%, phone idle: 10%, Live Wallpaper: 7%, android system: 5%, beautiful widgets, maps, speed test, android OS and advanced task killer 3%, 3%, 3%, 3%, 2% respectively. Still think it's not doing what it should. A good majority of the day I've left it in the off position, not messing with it. 30% by the time I leave work really kind of sucks.
I got the phone Sunday. Used the crap out of it Sunday and Monday and let it run almost down to 0% (it was warning me to plug it in) then let it charge to 100% which took hours and hours and hours. I remember when I had my Iphone down to like 60% when I left work I'd enable pandora streaming and plug it into the car charger and be back up to 85% by the time I got home at least, and it's a half hour drive.
When I plug it into the car charger or a regular outlet I'm lucky if it goes up 2% after a half hour. I'm starting to wonder if this thing has a bad battery.
cachookaman said:
ive been unplugged for 2 hours and 27 minutes and im down to 67%
Click to expand...
Click to collapse
What is your phone's uptime?
I've been unplugged since 6:45am this morning.. its about 2:40 now and I am at 73%.
I've been downloading apps, playing with androidVNC and just continually tinkering with settings.
My uptime is 111:40:00 and its been 7h 50m since unplugged.
I'm using launcher pro.
I have a bit of speculation that Touchwiz has something to do with it including its special widgets.
Something isn't right with that.
brandonb81 said:
Haven't done much with the phone all day. Installed juicedefender. Left it on easy settings. Not sure how much it's helping so far, if anything. This is my current breakdown: 8h, 48m since unplugged... 35% battery remaining. Display: 45%, cell standby: 16%, phone idle: 10%, Live Wallpaper: 7%, android system: 5%, beautiful widgets, maps, speed test, android OS and advanced task killer 3%, 3%, 3%, 3%, 2% respectively. Still think it's not doing what it should. A good majority of the day I've left it in the off position, not messing with it. 30% by the time I leave work really kind of sucks.
I got the phone Sunday. Used the crap out of it Sunday and Monday and let it run almost down to 0% (it was warning me to plug it in) then let it charge to 100% which took hours and hours and hours. I remember when I had my Iphone down to like 60% when I left work I'd enable pandora streaming and plug it into the car charger and be back up to 85% by the time I got home at least, and it's a half hour drive.
When I plug it into the car charger or a regular outlet I'm lucky if it goes up 2% after a half hour. I'm starting to wonder if this thing has a bad battery.
Click to expand...
Click to collapse
What the iPhone was doing is called a rapid charge. That 85% is not equivalent to an 85% charge that you would get from discharging from 100%
You should read this article.
hxxp://geekfor.me/faq/you-shouldnt-be-using-a-task-killer-with-android/
(replace xx's with tt)
mymansionisabox said:
What the iPhone was doing is called a rapid charge. That 85% is not equivalent to an 85% charge that you would get from discharging from 100%
You should read this article.
hxxp://geekfor.me/faq/you-shouldnt-be-using-a-task-killer-with-android/
(replace xx's with tt)
Click to expand...
Click to collapse
Fair enough. I'm very interested in checking out this article, but I've gotta run now. I was going to give the GPS one more shot on the way home. If I can't get a lock and the battery doesn't get much of a charge being plugged in the whole way I think I may take it back to the AT&T store and see if they'll swap it out or even give me a battery replacement.
Should I reverse the root before I do that, if I do? I know that's entirely off topic. Should I just remove the superuser permission app (if I even can)?
Additionally, just throwing this out there anyway, according to this review: http://www.boygeniusreport.com/2010/07/23/att-samsung-captivate-review/ their camera is awesome without any settings changes.. I find the regular camera kind of blows. I'll upload some pictures if anyone wants to see em, but I used my phone, on the basic settings, to take pictures of my Iphone which I was selling on ebay and the pictures came out kind of crappy, especially for being 5mega pixel. The video camera looks great, but the picture part of it I am really surprised at. My overarching point is I think there might just be some lemon phones out there possibly, and I think I might have gotten one. I'm running into all the major problems that some people are complaining about. Camera, GPS locking, battery, lagginess of the UI, etc. I think I'm gonna try to get AT&T to swap my phone out.
LIke said in other threads, mine just draining like crazy before but now it seems to be pretty bearable. Here are the things that REALLY helped me:
1.Completely drain the phone till its dead.
2.Fully Charge the phone with it off! Yes you can live without it for a little while
3.Disable the live wallpaper,
4.Use Launchpro and heaurisitc which is the vibration when the 4 buttons at the bottom are used.
5.Reduce vibration overall
6.Dim Screen
7.Turn off everything except I run wireless and fring 24/7 basically
AND this phone is fast,
I dunno if its available through the free launchpro, but I paid for the plus and its sooo fast.
1.I just disable all the animation crap and everything and make everything level 8 on speed of opening up
2.Disable the elastic animation when moving from screen to screen....
3. I would really suggest people pay for launchpro plus, cause its cheap and the work is almost gods gift to cell phones ahahhaa....
Hope this helps....
7am and now its 1PM with Wifi and Fring on since 10am and last checked its at 80% with a 15 minute phone call. and messaging probably 30 messages.
I am going to drain it till its dead tonight again and fully charge with phone off again. I think this helps a lot.
I unplugged my phone at 8:30...listened to an hour of Pandora, checked email, and was on Twitter...down to 85% at 10:30 which is pretty good to me. I also don't have a task killer installed for what its worth.
Sent from my SAMSUNG-SGH-I897 using XDA App
Well Update around 30 minuets my phone completely died for the first time so I am charging it now, and I am hopeful that it will get better soon.
HTH,
Charlie
Get rid of the live wallpaper, that uses quite a bit of battery
Sent from my SAMSUNG-SGH-I897 using XDA App
I just want to mention that I swapped out my captivate at the AT&T store yesterday. I let it almost die, then charged it to full, unplugged it for 5 minutes, charged it to full again, unplugged it for 5 minutes and charged it to full again and left it connected over night.
I've been using the phone all day today, changed settings, texted, generally used it, since about 6:45AM and I'm at 71% battery at 11:35. Insanely better. By a lot. With the old phone I'd be at 30 or 40% by now, honestly.
Additionally, the screen seems much brighter, even at the lowest setting. The camera seems to take better pictures and everything seems much snappier and quicker on the phone, by a lot.
I got the GPS to lock on once, and while it wasn't perfect, it followed me, and then I couldn't get it to lock again unfortunately, but I'll keep messing with it. I think it's a samsung update issue anyway, with regards to the GPS.
I really and truly believe that I got a lemon phone. I know that the AT&T store by me sold out on the first day so I definitely got this one from a different batch. This is like a totally different phone. If anyone else is having these kinds of problems with lag and battery life and things, try getting the AT&T store to swap out your phone. You have 30 days.
The iPhone and many other phones like the Droid charge faster for some reason.
From my Samsung Captivate

Another battery life thread...

Is there any way to get this thing to last over 10 hours with moderate/medium usage? I mean I hate to compare, but I was able to use my iphone 4 hard periodically through the day and be at 40% around midnight, but I have to stay using my captivate very lightly after about 10pm, and I usually unplug around 12 to 1pm..
I don't want to have to sacrifice majors perks of why I switched to android just to get a full day out of it. I've tried a lot of the suggestions I'm the forums, but nothing makes a notice difference, or makes it a fame changer as to where I'll get a full day of moderate internet/media usage
Thanks in advance.
Sent from my SAMSUNG-SGH-I897 using XDA App
Have you tried draining and recharging the battery as other threads have suggested? I usually unplug around 9-10am and I don't get battery warning until near midnight or later.
I keep seeing people complain about the battery life constantly.. but to me coming from my bb bold it seems that the battery is lasting way longer then i expected.. first couple charges i let the phone drain down till it shut off, and then charged it 100%.. its still new to me so im constantly playing with it and changing the menus around.. i try to make sure almost everything is closed when im not using it.. cause im sure that eats battery life..
asrrin29 said:
Have you tried draining and recharging the battery as other threads have suggested? I usually unplug around 9-10am and I don't get battery warning until near midnight or later.
Click to expand...
Click to collapse
I did it once, but I booted back up the phone a few minutes after I plugged it in, will leaving it off while it does a full 100% charge noticeably increase battery life?
Do you have widgets updating frequently? How frequently? Maybe just too many updating widgets. I get about 18 hours with the screen on for 4.
18 hours also
I'm getting 16-18 hours of use with about 4-5 hours of screen time. Better than expected.
Today I used my phone as much as I used my iPhone 4 on a regular basis. My phone has been off the charger for just over 12 hours and I have 70% of my battery left.
dbodom said:
I'm getting 16-18 hours of use with about 4-5 hours of screen time. Better than expected.
Click to expand...
Click to collapse
I'm around that too, I use a black background to save power and I have about 5-6 hours of screen time and I watch a movie on it every day (treadmill at the gym)
I only get low battery around midnight
I use advanced task killer and set it to when the screen is off to kill apps, aggressive mode, I can go about 20hrs before I need to recharge. 5-6hrs screen time.
djgleebs said:
Is there any way to get this thing to last over 10 hours with moderate/medium usage? I mean I hate to compare, but I was able to use my iphone 4 hard periodically through the day and be at 40% around midnight, but I have to stay using my captivate very lightly after about 10pm, and I usually unplug around 12 to 1pm..
I don't want to have to sacrifice majors perks of why I switched to android just to get a full day out of it. I've tried a lot of the suggestions I'm the forums, but nothing makes a notice difference, or makes it a fame changer as to where I'll get a full day of moderate internet/media usage
Thanks in advance.
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
One thing about android is it has true multitasking. Combined with some apps which do NOT close properly and continue to use up CPU this can drain your batter very fast.
In the battery Info your TimeSpentAwake should be ~ the same as Display on time. If not something is not closing properly. Use OSMonitor to check which program it is and either uninstall it or make sure to kill it with task killer after using.
I have the M110S (Korean Galaxy S - I get 16-18 Hrs with moderate use, but M110S comes w/ 2 batteries so i just swap )
Yeah based on people who are getting good battery life mine is absolutely terrible. I am on my fourth full discharge. I have had my phone off the charger for 2 hours and I'm already at 87 percent. I listened to about 45 minutes of cached slacker radio and like 2 posts on xda app
Sent from my SAMSUNG-SGH-I897 using XDA App
My battery went down 2 percent just posting that last post
Sent from my SAMSUNG-SGH-I897 using XDA App
I think I am going to have the phone switched out at best buy today
Sent from my SAMSUNG-SGH-I897 using XDA App
Just to comment on my battery life. I got my phone saturday (2.5 days ago) and its been on the whole time with medium usage. When I got the phone the pamphlet inside said "fully charge before you turn on" and thats what I did. My battery is at 41% and the only time that I have charged it since is when I am connecting it to my PC for a very short amount of time. I have had great battery life so it is possible. I am very impressed with it.
Yes...my battery life has been good...
Screen brightness all the way down (auto brightness off) *same for the browser brightness
Screen timeout 15 secs (annoying sometimes so maybe 30 secs)
No window animations
Power saving mode off (no point in having the lcd adjust if its already as low as it will go)
I also dont have any widgets that update in the background, however i'd imagine one or two wouldnt affect the battery much
These settings have worked out for me and i use the phone moderately with 2 hourly updating email accounts.....
Sent from my SAMSUNG-SGH-I897 using XDA App
Battery life for me has been decent. I consider myself a moderate user and I can go from 7:30am till I go to bed at night without dying, but its close. Coming from an iPhone 2G, where with the same usage I could get 2-3 days on one charge, its a little disappointing. But it is what it is I guess. I have heard horror stories of EVO's only going 4-6 hours on a full charge, thats ridiculous.
But what gets me is all this nonsense about fully discharging before charging back up every time. These are Li-ion batteries, they are not Ni-cads, they will not get a "memory" if you dont fully discharge every time. Yes, its good the very first time, to fully charge it before using it, but after that, it doesnt really matter.
Also, one more thing I noticed. The phone will stop charging the battery the second its fully charged. So if your phone reaches 100% charge at like 2am, it stops charging at 2am and you are then going from 2am till whenever you take it off charge in the morning. I noticed this the other day. As soon as the phone told me it was fully charged, the battery icon turned into a normal battery icon even though it was still plugged in. So its possible that the phone is going for 4, 5, 6 hours off charge before you even wake up. What I do to make sure I'm at 100% when I leave, is when I get up I unplug it, use it for a minute then put back on charge while showering. Then when I leave for work, I know its fully charged at 100%.
I guess I'll be switching out phones at Best Buy today as well. Phone keeps losing 30-40% overnight (more like 5 hours max since I'm a night owl) even with everything turned off. When I do get back to a 90% charge before I leave for work at 8am, I'm usually left with 30-40% by 5pm after 15 texts or so and a few emails.
I am fairly sure all new batteries have a chip in them that regulates the power. So you HAVE to run it down to 0-5% and charge it back too 100% several times before the battery is even calibrated for use. That has to be why its 50/50 battery sucks battery is great, just let it drain and charge it again.
battery life simply not acceptable
Hey guys,
I know many people post on battery life.
Here is my situation.
I do not care about beauty, but functionality is a must.
I am in the hospital from ca 6am to 7Pm and I have Q4 call meaning every fourth night its to midnight. That is simply a fact of my life.
My requirement:
I need my phone to last for this duration without recharge.
1.)
I don't need or use widgets
2.)
I don't need or use a wallpaper other than a solid black background.
I do need and use:
the GSM radio and wifi both need to run the entire time and reception is what it is.
My applications of use:
merck manual, dynamed, epocrates the usual in my boat.
I really really want to use this phone, but battery life wise only my blackberry with extended battery and my iphone 4 can hack it.
If any of you have any suggestions on what I could do plz let me know. My last resort is carrying two batteries, but that would frankly be admitting that this phone is inferior to the iphone 4 which can hack a 20 hour usage day in my setting.
(I absolutely cannot turn wifi or 3G off both must run)
I am open to all suggestions including the task killr controversy or anything else constructive one may have. Any extended size batteries out there for the captivate?
Thanks a bunch in advance.
(Having had my secretary spend 4 hours rooting the phone and sideloading Merck manual is a testament to the pathetic entity that is AT&T by the way. If you have professional apps from an institutional subscription you cannot download the software from the market...)
PS: My secretary is not exactly a hacker so forgive the 4 hour timeframe.
I consider myself to be a heavy user!! I like to text, browse the web, listen to music (either from my own files or streaming,) check email and comment on facebook all throughout the day. I did that perfectly fine with my Bold 9700, that battery lasted a full day or more.
I had an iPhone 4 and my battery would not last my 8 hour work shift!! I either had a bad battery or who knows what was going on with that phone. I didn't even leave the apps running...the phone was nice, but that battery killed it for me. I don't understand how some people got a full day out of it.
On the Captivate the most I have gotten has been around 10 hours of use and that's not even using it how I normally like to. I stop charging it at 8:30 and my battery is 100% around 10am I'm already in my low 90's or upper 80's. I don't have any widgets updating, I have a black wallpaper, I don't have the haptic feedback on, and I sync email hourly.
Could my battery be bad?? How can some of you manage to get 16 or so hours out of it??

[Q] 9hrs unplugged, 44min display, 3hrs run time, 40% battery left

I have been having problems with my battery life pretty much since I have had this phone. I downloaded spare parts app to give me some insight because I have also noticed several times phone seems warm even when screen has been off for some time.
As of right now today, to give an example, my phone has been unplugged for the last 10hours and I only have 44% battery left. Says display is responsible for 71% of battery use yet screen has only been on for 44min of that time (and I have the brightness turned all the way down). According to spare parts "other usage" my "running" time is cause for 35% of batter use at over 3hours.
With these things in consideration I feel that there is something that is stopping the phone from properly sleeping due to the phone being warm at times display has been off for a while and the contrast between screen on and running time. Partial wake usage doesn't show much running under it as most listed items have only a sliver of a bar showing.
Can someone please lend me some guidance on how to further troubleshoot this problem?
i mean that type of battery consumption doesnt seem irregular to me...im at close to 10 hours for the day and have 59% left.
Are you in a shaky signal area? Thats one reason my phone gets warm. especially if its a fringe area where it cant decide between a 3G signal or 4G signal.
In spare parts there is a option for partial wake lock. If something is stuck at 100%, then you know you yuo have a rogue app thats causing your phone not to sleep
But can you confirm it being normal to see 34% time running under other usage settings for spare parts? Partial wake usage as said doesn't show much keeping a wake lock going.
As for signal, not too sure, very rarely if ever see a 3g change over. Is usually at 4g and occassionally hitting edge.
WOW, you get that good of battery out of yours? that seems epic haha, i get 3-4 hours tops.. i mean i abuse it, but still..
I charge mine at night. Ran it from 7am to 12am and it was at 34%.
Yeah see...7am to 12am and 34% remaining? No way I get that.
If it werent for the results I'm posting regarding "running" percentage from spare parts other usage and the screen on time I would just accept it as a phone deemed to have bad battery life, but it seems to me like something is going on and I guess I'm looking for someone to confirm or dismiss my suspicions.
Maybe I'm also a little spoiled coming off my G2 that was rooted running CM Rom and CPU ramping/cut down which in combination gave me, under the same amount of use, a situation where I was getting home at night and still having 40-50% battery left in comparison to the 15% I commonly see now.
adambowersva said:
Yeah see...7am to 12am and 34% remaining? No way I get that.
If it werent for the results I'm posting regarding "running" percentage from spare parts other usage and the screen on time I would just accept it as a phone deemed to have bad battery life, but it seems to me like something is going on and I guess I'm looking for someone to confirm or dismiss my suspicions.
Maybe I'm also a little spoiled coming off my G2 that was rooted running CM Rom and CPU ramping/cut down which in combination gave me, under the same amount of use, a situation where I was getting home at night and still having 40-50% battery left in comparison to the 15% I commonly see now.
Click to expand...
Click to collapse
once some custom kernels come out that let you uv/uc/oc then i would say you can expect the same type of results..i just went on a trip with a friend who has a g2 and he was constantly crying about his battery dying, (stock), where as I only had to charge mine on average 1.5 times a day with moderate to heavy usage. I find this battery phenomenal compared to all the other android devices ive owned and tested
damn!
i charge mine every other day.. hehehe i dont abuse it or anything though.. just regular internet every few minutes or so.. i have the BETA juicedefender installed guess that helps a lot. data is off when the screen is off, set it to agressive..
here is the app hope it helps...
I noticed the same problem,i brought this phone on saturday and was very impressed with the battery until yesterday night I noticed the same thing, my phone was at 50% and I had it sleeping then I get the battery low notification 10 minutes later and the back of the phone was real hot. This can't be normal cuz I have the same apps installed from 2 days ago and I was using the phone heavily even using mobile ap and still didn't have this problem, if you guys find a solution please share it with me.

[Q] How is the battery life on your transformer

Post your battery usage on your transformer, and how much juice you are getting.
Mine looks like it's draining much.
Sent from my DROIDX using XDA Premium App
I had 100% battery when I started using it last night at 4pm used it heavily from then until about 830, which included the firmware update and some angry birds and I was just under 50% by 10pm after 1.5hrs of standby. Didnt plug it in until i left for work after some browsing this morning andwas at 35% then. Hope that helps!
I have an ipad 2 and a transformer and par to par my ipad 2 last longer, but I love honeycomb and it's probably due to the fact that we have real background applications
Sent from my DROIDX using XDA Premium App
For my first charge, I wanted to charge it up and then run it down until it died to calibrate the battery. It lasted a good two days, probably 9 hrs of pretty heavy use as I goofed with it constantly. It was hard to get it to finally die, I turned the brightness up all the way and kept it alive to kill the last 5%.
It was draining pretty quickly at first but it improved over time, specially after the first FOTA.
I've been using it on and off over the past 3 days and it has just over 40%.
brachiopod said:
For my first charge, I wanted to charge it up and then run it down until it died to calibrate the battery.
Click to expand...
Click to collapse
Just wondering do we really need to run it down till it dies and then do a full charge?
dazz87 said:
Just wondering do we really need to run it down till it dies and then do a full charge?
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I dunno. People are all over the road on this, so I'll just give you my opinion. I don't think that full discharge of lithium ion batteries is good for them. These aren't the old fashioned NiCd batteries where that was true. The more you use your lithium battery, the shorter it's life. There are people that say otherwise. That said, on an Android machine, I think that the battery calibration needs to see the full range of the battery to be accurate; and it is worth one full cycle to get things working. That's why I did it. I'm not recommending that anyone else do it, that's just what I did with mine.
I thought mine was draining fast at first but I'm on about 32 hours since it was plugged in to get its full charge. Of that a solid 3 to 4 hours of use easy. Currently at 19%
Sent from my Transformer TF101 using XDA Premium App
Wouldn't it take a couple of discharges and recharges before the battery gets conditioned?
The other day it was on 100% brightness and light usage I think I got 6 hours out of it. 5 hours in use I'd say. Max brightness and touch intensive stuff like angry birds and playing w/ it FWIW. I'm sure at a lower brightness you could get close to the 9 hour battery life. On the other hand before work I unplugged it at 100% and it sat in a 40 degree car from 7:00am to 5:00 pm and only fell down to 94%.
Asus does recommend a series of full discharges and then basically keeping it topped off from then.
I've been using it almost non stop since 8:00 pm, when it was fully charged. Now, it is 3:00 AM, and at 42% battery life. If it keeps going at this rate, I should have over 10 hrs of battery life. It is on auto brightness. I've been using it to study pdf powerpoint slides, playing some angry birds, and surfing the net with firefox. During the longer studying sessions, I used airplane mode. That probably saved battery life.
I left my transformer fully charged last night and turned it back on this morning to find the charge at 55%.
Didn't seem to be any background apps running that could have accounted for the charge drop, though my wifi was stuck off requiring a reboot to turn it back on.
Anyone else with similar experiences?
den997 said:
I left my transformer fully charged last night and turned it back on this morning to find the charge at 55%.
Didn't seem to be any background apps running that could have accounted for the charge drop, though my wifi was stuck off requiring a reboot to turn it back on.
Anyone else with similar experiences?
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I am having the same issue. Last night I had 42% when I put it in sleep mode. This morning tried taking it out of sleep mode and the tablet reboot some time last night Weird. When it came back on it was down to 22%. Dont know but I am getting horrible battery life. Started using it at 10pm last night and by 1 am it was at 45%. Had on auto brightness All I did was surf, and stream music from my server. Maybe I need to drain it down tonight......
dazz87 said:
I am having the same issue. Last night I had 42% when I put it in sleep mode. This morning tried taking it out of sleep mode and the tablet reboot some time last night Weird. When it came back on it was down to 22%. Dont know but I am getting horrible battery life. Started using it at 10pm last night and by 1 am it was at 45%. Had on auto brightness All I did was surf, and stream music from my server. Maybe I need to drain it down tonight......
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That shouldn't happen. Maybe try turning airplane mode on before you go to sleep? Or maybe you need a task manager?
Attached an image of my battery life. I definitely got around 11 hours on one charge.
As for recharging, it seems to recharge to full in 2-3 hours.
I'm finding that during actual use, my TF is doing about as well as my Xoom. However, the Xoom is using MUCH less battery while on standby. Where the TF is burning around 2.5-3%/hour on standby, the Xoom burns <1% on standby.
I'm still on the original build (i.e., haven't had a single update applied) and as noted earlier in the thread some things might have been optimized. And, I'm still burning on average around 3.5%/hour, so that still translates to over 25 hours battery life. Not as good as the Xoom but still pretty decent.
If it gets a little better in standby after an update, though, I won't complain.
I got 9 hours 34 minutes of CONSTANT use. For 4 hours straight I was running a flash application constantly.
I'm doing my second batter run down right now with normal usage.
When mine worked, I used it for nearly 2 hours straight on wifi with the screen on Auto, playing games and browsing the web. It drained 20% extrapolating such I'm getting the 9.5 hours of constant use WITH games. I was pleased until my screen failed on me
When you all drain the battery, are you taking it all the way till it powers itself off or plugging in at a low power state?
Sent from my Transformer TF101 using XDA Premium App
i don't have exact times but on my first charge it drained fairly quickly and was below 15% in maybe 36 hrs? with my xoom the first charge lasted 5 days! so in comparison as of right now the xoom had better battery life, but people are saying it gets better so we'll see. i don't mean this as a complaint at all because it doesn't bother me to charge it and i love this tablet. just something i have noticed.
i might add that these times i have given are just browsing, using a few apps and games, but no movies are anything.
aftre seeing a couple other posts in this thread it seems the xoom may just be getting much better standby time.

Very curious quirk On Android Open Kang Project ROM... Near Unlimited Battery!!!!

hi all...
soo after my comments over a week ago on the aokp website for this build, i decided afterall to take the plunge and update. i was on b26, so subsequently had to flash b27 and then this. everything has gone absolutely swimmingly with no issues at all so far....
HOWEVER>>>>>
I am faced with a very puzzling quirk. its by nooooo means a problem at all, infact it quite the opposite!!! let me explain.
i've started charging my phone in the evening these days for some stupid reason and then, when charged taking it off and going to bed. After getting this milestone on, my battery has been killed over night, draining to around 15%. Normally, it would drain to around 70% and be flat by the end of the day ready for charging again.
This continued for a few days when i decided to root out the cause of the massive overnite idle drain. I installed a fantastic free app called Badass Battery Monitor (which i highly recommend btw!), and over a period of a couple of days the offending app was weeded out. It was Nova Launcher. This had never happened to me before and couldn't understand it. So, as part of my diagnostics, I decided to confirm the findings by removing it and just using stock.
Over a couple of days monitoring, with exactly the same charging method, my battery levels returned to normal drainage with around 75% battery left by the morning. Fantastic. I had found the problem fixed it and got back to normal. Soooo where is the quirk i here you say!!!? lol Well......
On average, from everything i've read in forums, battery drain overnight while phone in standby is around 20/30%, so mine WAS right up there with the majority of you.
Last night, i decided to charge to full and then wipe battery stats. Which i did. Now, bare in mind here that I ONLY have the standard battery that is supplied with the Galaxy Nexus. I got up this morning, and to my utter amazement, my battery had only drained 2%
Now been incredibly realisting here based on average overnight drains, i was 100% sure that this was deffo an error. I have done everything from restarting the phone, taking the battery out, but still the level in my battery was saying the same.
As I sit here writing this, I have been streaming a radio station via wifi on the phone for the last 2 hrs, and atm my battery is telling me that it is STILL 85% full.
I am DEFFO not complaining, but i'm sure now, you can see why the hell i am so puzzled! HOW THE HELL IS THIS HAPPENING, because i can genuinely find no explanation at all for it
as a follow up, it is now more or less 5 hrs since my orginal post, and my battery is reporting that it is 75% full
Jeesh, 20 to 30 idle drain overnight? My phone drains about 3 to 5 overnight which is typically 8 hours of sleep.
Sent from my SGH-T989 using XDA
Interesting quirk. Are you a heavy or a light user? It'd be nice to see how it drains after a full drain and recharge.
Mrgadgetz said:
Interesting quirk. Are you a heavy or a light user? It'd be nice to see how it drains after a full drain and recharge.
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well, to see if what was been reported was correct, i've been an absolute heavy user today. i have wifi on, ive streamed radio via internet for around 3 hrs, ive been playing all sorts of games and watched a few youtube vids. and my battery is atm reporting 74% life left
so here i am, STILL very very puzzled..
my battery life is just going and going with no signs of running flat... have a look at these screenshots and give me an explanation as to why i suddenly have a super battery!
MAYBE you really have a super battery or your mobile is glitched and shows the battery like that due to laG?
I'm on miui and I lose 0% overnight. It just depends on the ROM, but 20-30% is ridiculous!
Sent from my GT-I9100 using XDA
AOKP IS AMAZING
AOKP MS4 CM9, *goes all day without charging phone *
Ictcreations said:
so here i am, STILL very very puzzled..
my battery life is just going and going with no signs of running flat... have a look at these screenshots and give me an explanation as to why i suddenly have a super battery!
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Your states do not seem super impressive. On most phones the screen is the biggest drain. You show 49% battery with a screen on of only 1 hour. After 33 hours you've only used your phone for 1 hour screen on. Thats VERY little.
I usually get 2.5-3 hours of screen on time for my galaxy nexus.
Ictcreations said:
I installed a fantastic free app called Badass Battery Monitor (which i highly recommend btw!)
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Thanks for the app recommendation! Been looking for something like it all day.
This will depend on ROM/Radio/Kernel user installed programs/sync etc but 2-6% is normal drain over night anyone with 20% needs to seriously look @ battery stats and work out what's causing wake locks.
Also not forgetting most phones need to bed in after a flash which can take 2-3 days before we see real battery info.

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