Hi there!
First of all great forum, and very good informations all over!!
Hopefully someone can help me with this.
Im having a htc hd2 with the following settings on WM:
Os version
5.2.23128 (23128.5.3.8)
Manila Version
2.5.20161332.0
ROM version
chuckyRom WWE
ROM date
07.08.2010
Radio version
2.10.50.28_2
and i´m using andriod with
Modellnummer
Nexus One
Andriod version
2.2.1
Baseband-Version
15.40.50.07U_2.10.50.28_2
Buid Nummer
FRG83
so... the problem is, my batterie only runs for 6-8 hours... i installed as "SetCpu" "advanced task killer" and "battery Indicator" and changed the setcpu settings just like sujar did on this side ( http://forum.xda-developers.com/show...=734886&page=6 )
I also turned of "auto rotation", all animations are off, and my display timout is 1min... BUT -> "battery indicator" says, that 89% of my power goes away with my display...
I really hope, somone can help me with this, cause its very ****ty to recharge my phone every 8 hours...
looking forward to some answers!!
thx everyone!
What SD card you using ? ..
With my 8gb class 6 card, the Current Widget shows 3mA (stand by)
same build other card (2gb class 4) Current Widget shows 69mA (stand by)
How often do you use your phone? Sometime, w e forget that the battery drains fast because we're constantly on wifi or 3g and playing games.
turn off gps, wifi, 3g if not needed. boot android when keylights are on.
i can use android up to 20 hours with normal use (some phonecalls, internet, searching marketplace, checking twitter, weather, mails and so on every hour...)
maybe try another radio, another wm-rom, android build... 'search' is your friend there are so many threads/posts about battery...
hmm today the battery was emtpy after 5 hours... having 3 calls ( 3-6 minutes) and beeing most of the time in stand by modus...
@ bytefax: i have a scandisc 2GB... i dont know wich level... -> does that mean -> the bigger the sd card, the less gets the battery use?!?!
@azzzz: at the moment i try to use it only if its really necessary... just to check out how long my battery lives...
@tranquillo: i´ve already checked several posts, but what i´m looking for now, is someone, who got the same phone as I do and let me try his SetCpu settings...
übrigens... ich tu mir auf deutsch etwas leichter... danke schonmal für die hilfe... wär super wenn ich mein htc länger als 5 stunden benutzen könnt.
greez
Try to run CLRCAD and HARET whit the keypad lights on.
I had mattc 1.5b installed, in standby mode I was getting 5-9 mA drain (current widget numbers). I upgraded to mattc 1.7 it jumped to 20 mA drain in standby. did a clean install of 1.7, still 20+ mA drain. went back to mattc 1.5b and drain was 20+ mA in standby. switched to mdeejay sense build 20mA drain in standby, formatted card several times no change. turns out that android was only charging battery to 96%. once I charged the phone in windows mobile to 100% both mattc anb mdeejay roms get 7 mA drain in standby. each time I notice an increase in battery drain (standby) android does not charge battery completely (when android charges to 96% I get 20+ mA drain in standby, when android charges to 94% I get 70+ mA drain); I simply charge battery in windows and battery drain goes back to normal. 20+ hours with moderate usage, 40+ hours light usage.
Sent from my HTC Desire using XDA App
Fully Charge while Device is Off before first boot, then upon first boot go to terminal and enter these (without the quotes) and press enter after every line.
"su"
"rm /data/system/batterystats.bin"
Ensure that Keypad Lights are on when Haret is launched and you will be healed.
@ amcjungle -> terminal?!?!
Terminal emulator is an app. You can download it from the Market. A terminal is a way to gain access to a system.
@amcjungle: ok... thx for that info. Terminal is probably an app for windows mobile?
the last thing i dont really get to 100% is, what you want me to do with the Keypad Lights... they should be on ?!?
If you could make a screenshot or explain it, this would be christmas like!!
best wishes and thx for the help!!
spreiza said:
@amcjungle: ok... thx for that info. Terminal is probably an app for windows mobile?
the last thing i dont really get to 100% is, what you want me to do with the Keypad Lights... they should be on ?!?
If you could make a screenshot or explain it, this would be christmas like!!
best wishes and thx for the help!!
Click to expand...
Click to collapse
Terminal is an app for android. What you would want to do is charge your phone completely while off or in windows mobile. Probably better while turned off, although that part I cannot confirm. So with your battery charged to 100% just press the call button or something to activate the keylights. so that call, windows, back, and all other buttons are lit. While they are lit up start android. They will turn off, but we want them on when haret loads. Once into android open terminal emulator or download it from the market. Then type in su to gain super user access and then the other command to clear the battery charge memory.
At times my standby voltage will go to 120ma and up. When it happens I open the process button on the Weather and News widget and I close every process that is running. After that I hold down the power button until the option to Power Off shows up on the screen. Once I power off the phone I just restart Winmo and Android normally and my standby voltage goes back to 6ma.
If I let it run at >120ma standby voltage the battery will be drained within 5-6 hours every time.
chadhayson said:
At times my standby voltage will go to 120ma and up. When it happens I open the process button on the Weather and News widget and I close every process that is running. After that I hold down the power button until the option to Power Off shows up on the screen. Once I power off the phone I just restart Winmo and Android normally and my standby voltage goes back to 6ma.
If I let it run at >120ma standby voltage the battery will be drained within 5-6 hours every time.
Click to expand...
Click to collapse
Dont use task killers unless you know what you are doing. They are mainly for apps that wont close (freeze) or apps that you yourself have opened. If you close system prosseses like weather, news, messaging, and so on you are only making things worse.
That's why you need to shutdown and restart phone after you close them. When you restart the phone the needed processes will be started too.
I've tried this with task killer and it does nothing, the only luck I've had has been with the process toggle on the Weather and News widget.
thx for giving me this detailed explanation!! i´ll try this and let you know how things are doing!!
Hi, I've tried exactly the method you said but when I type in the last line (ending batterystats.bin) it says its not found.
Have I done something wrong?
Cheers
Sent from my HTC HD2 using XDA App
QA5IS said:
Hi, I've tried exactly the method you said but when I type in the last line (ending batterystats.bin) it says its not found.
Have I done something wrong?
Cheers
Sent from my HTC HD2 using XDA App
Click to expand...
Click to collapse
are you putting in a space after rm?
rm(space)/data/system/batterystats.bin
if you did then you do not have this file
when exactly are the keypad lights supposed to turn off? Mine seem to stay on indefinitely.
Still having Probs
Hey there. I,m having some issues with my battery too.
My Build belongs to Bangster (v 1.5) (great work) on ChuckyDroidROM Lite with Radio 2.15.50.14 running on Scandisk 8 gb class 2. Michi R11 AXI kernel.
I do not have several Sd cards to test consuption.
I read the Thereads about heavy battery drain for the last 4 days.
I tryed differend Radio Roms, i tryed different WM Roms (Flashing VBNROM AGAIN at the moment)
I tryed to fix the Keypad Lib, loaded my battery in win/off to 100 %, switched off all background services except 3g, do NOT have any taskillers or something (Android isnt meant to let tasks get killed by user i think)
I tryed to boot with Keypad lights on and use Set CPU as recommended with no overclocking.
i Use brightness lvl 25 %
BUT my battery drains at last with 60 ma (current widget) within 5-6 hours nearly to empty.
I dont know any further.
I rellay need my Phone with Sync to Google for more than that. Can't load my phone on German Autobahn (i'm slightly often there)
BUT i had a very good Battery life with mccmjohn's 2.5/VBN/2.14/Michi R11 in the end it was not stabel for me.
I dont have the time to try all the Builds with different Kernels in combination with all the WMRoms.
Can Pls someone help me????
PS: I dont want to annoy any of the devs, awesome work they did
i'm LeoDroid user since first Darksone build
Related
Hi.
After my upgrade to android 2.1 my battery starts to decrease rapidly...
i had 52 percent in the night around 11 p.m when i woke up in te morning 7 a.m it was 11 percent..
Is ter a way to improve battery power..?
Is it possible to monitor which app drains te battery power?
Pls do help me..
Thanks
I had same problem. Try not to charge ur phone via pc to phone usb cable. Try and get a proper wall socket charger. And if u cant then try replacing ur usb cable.
Sent from my X10i using XDA App
Stop using autokiller apps. If you want to kill apps, do it manually.
I've never had better battery life since the 2.1 upgrade. Here are some suggestions from my experience.
1. Get Juice Defender free from Market, do setup and change nothing.
2. Get Startup Auditor free. Disable face recognition, download manager, google talk service, mediascape update.
3. Get Advanced Task Killer and exclude ATK, Startup Auditor and Juice Defender. Kill everything else whenever you go to lock your phone after doing something.
4. Only use Wifi when you need to, otherwise turn it off, GPS as well.
5. A 3G toggle wouldn't hurt either.
6. Use a wall charger as indicated otherwise if from PC charge in airplane mode.
7. Put your screen brightness below 50%.
8. Widgets like weather apps on your homescreen suck up batt life.
If I get into the 70% range of battery after a day's use now it's rare.
Good luck!
mpasanthosh said:
Hi.
After my upgrade to android 2.1 my battery starts to decrease rapidly...
i had 52 percent in the night around 11 p.m when i woke up in te morning 7 a.m it was 11 percent..
Is ter a way to improve battery power..?
Is it possible to monitor which app drains te battery power?
Pls do help me..
Thanks
Click to expand...
Click to collapse
Try going to SETTINGS, ABOUT PHONE, BATTERY USE.
You will be able to see what the top drains are, I do not use any special apps to limit battery use and get only 4 - 8% drain over night. Leave Bluetooth off and turn off display.
Just for the record, juice defender makes no difference to battery life on either of my x10i's since 2.1.
I just trimmed out junk apps and use a task killer to manually kill a few apps I don't often use.
Finally, make sure twitter, facebook, etc are not set to check automatically unless you wish them too. I only check stuff like that a few times a day, no need for them to check x times an hour.
Sent from my X10i using XDA App
hi...
@Lord Takyon,Tony_C,Smoked33,pabling19,xateeq, thanks for the reply will try out the steps mentioned..
i at first had poor battery life with the x10 2.1. that was actually when i used task panel x and juice defender on it... after a couple of days, though, i figured screw it and rooted the phone and uninstalled all useless apps on it. then i just went and uninstalled juice defender and task panel x. they actually caused battery drain on my phone lol. now i have no battery saving apps running on my phone and it lasts me at least 18 hours of medium usage.
my advice is let android do the battery saving. don't d/l battery saving apps since they run in the background and cause more battery drain.
Yeah - I've been through the whole juice defender, task killer, start up auditor things..... waste of time.. they do more harm than good..
You need to use something like Task Manager (by Rhythm Software) to see what's running - set any persistent tasks/ apps to ignore, and ONLY use it to kill apps which you think are stopping the phone from sleeping..randomly killing things will at best cause your battery to drain quicker (because the processor then has to restart them).. or at worst cause instability because critical tasks aren't running.
Set auto update frequencies to less frequent.. consider how often you view the app during the day and go along those lines.. don't put too many auto updating widgets on your homescreens..
Read this thread by xeviro...
http://forum.xda-developers.com/showthread.php?t=844256
During these months I always searched for a solution to the very well known issues that plagued our Folios without finding something really useful, but now the game is over (so I hope). Let's see how:
The problem(s):
-Foliomod 1.4 (thanks Dexter, you made my day when I discovered it), is the best rom you can find ATM for the Folio table: it's fast, it's smooth and really stable, and it's based on the last Toshiba rom. But it suffers from a couple of major issues that make it less than perfect (all the issues are from the original Toshiba rom, Dexter did not add anything). These issues are the SOD (sleep of death) that make the device never go out from standby (you have to reboot to regain control of the device) and frequent spontaneous wakeups from standby that make your battery drain quickly when you put the tablet in hibernate mode.
The solution:
The solution is based on a mix of magics with a little bit of luck (only to say that what is working for me, can work for you too, or cannot work at all: I give no warranty!)
Download and install the following software from market:
- SETCPU
- SCREEN OFF (by techvision systems)
- BATTERY GUARDIAN
Now, in setcpu, configure the system as Tegra2 and raise the min clock to 608mhz and tick "Set on Boot". This will help with SOD.
After that, put a shortcut on your homescreen for the "Screen Off" app.
Then, go to Preferences and set the device to never go to sleep in display options.
From now, you'll use only the shortcut to the "Screen Off" app to put the device to sleep, and you'll use the power button only to wakeup the tablet. You'll notice that you have to press power button three or four times before the device really comes out from sleep, but it will never fail.
Finally, reboot the device to activate Battery Guardian (it's a little daemon that closes all network connections when the device is in standby, and reactivates all the connections on wakeup).
Ok you are ready to go. My tablet is really perfect with these mods, I hope the best for you too, but remember that what's working for me, could work or not for you: don't blame me if this doesn't suit your needs.
My Folio wakes up only when I need it, and it gave no SOD in one week of intense use. Post your feedbacks, please...
Thanks for share it with us, i will try.
Thanks for sharing.
I don´t have foliomod instaled but i gave it a go on cyanogen 7 and screen off works ( have to use power button 3 ou 4 times to wake up, but works) , battery guardian didn´t work (after wake up it won´t connect to wifi until i clean my wifi password , insert it again and connect manualy).
As nothing to do with foliomod but i wanted to share with everyone .
Problem
The SOD mode is wrong in the Foliomod 1.3d?
Thomas7610 said:
The SOD mode is wrong in the Foliomod 1.3d?
Click to expand...
Click to collapse
Foliomod 1.3d is not different from 1.4 under this aspect. The kernel is older and some app FC randomatically. The only reason to keep it is 3G support.
problem
The screen off (by techvision) could not find in the android market..
Thomas7610 said:
The screen off (by techvision) could not find in the android market..
Click to expand...
Click to collapse
http://techvisionsys.com/
I can find it on market, black icon with red power
Hi,
Is there any replacement app for SETCPU you would recommend?
I understand that SETCPU is not free...
I also cannot find the Screen Off app, even if I use the download link at their homepage
screen off
I cannot download also but I find another free version..Itt seems right now I have 5% decrease after one hour.This is good result?
lillknurra said:
Hi,
Is there any replacement app for SETCPU you would recommend?
I understand that SETCPU is not free...
I also cannot find the Screen Off app, even if I use the download link at their homepage
Click to expand...
Click to collapse
forum.xda-developers.com/showthread.php?t=505419
www.androidzoom.com/android_applications/productivity/screen-off_piig_download.html
www.androidblip.com/android-apps/screen-off-119036-download.html
screen off
Topogigi said:
forum.xda-developers.com/showthread.php?t=505419
www.androidzoom.com/android_applications/productivity/screen-off_piig_download.html
www.androidblip.com/android-apps/screen-off-119036-download.html
Click to expand...
Click to collapse
I send it to email but the android link doesn't exist....
Thomas7610 said:
I send it to email but the android link doesn't exist....
Click to expand...
Click to collapse
don't know if it works: comes from my titanium backup. remove the last. zip extension before decompress and try...
I didnt find screen off either but I searched for techvision only in market and then I clicked on the button that shows other apps from the same company. There it was.
brunte said:
I didnt find screen off either but I searched for techvision only in market and then I clicked on the button that shows other apps from the same company. There it was.
Click to expand...
Click to collapse
I tried this and found it
Problem is that the Folio says that it can't download it...
Can someone make a backup of the app and post it here or at a fileshare?
Try downloading with dolphin browser or opera
I have a question !
It's really necessary to have installed battery guardian ?? I want to be noticed with a sound if I have a new notification. Folio is going to deep sleep if i don't install battery guardian too ?
Hi guys!
I'm a new (proud?) folio owner, and so far I've tried FolioMod1.4 and FolioTNT1.0, but I've been seeing wifi problems, SOD and sometimes random freezes, and random wakeups from sleep.
1. I've downloaded the app called "CPU Master Free" which allows changing the minimum and maximum frequencies (as a replacement of SetCPU).
2. I've disabled the "screen timeout" in settings->display (I guess that was what was meant by display sleep in the OP)
3. Installed "Screen Off" to turn off the screen
Seems like it works, except that I guess the battery life is decreased by a lot as the device is running at the lowest running at 3x the minimal frequency.. (I get around 5h usage with screen at 50% + Wifi + Browsing)
I've also read that the SOD is a driver issue, and nvidia has released an update which "fixes" it... Anyone knows anything about that?
Another issue I've noticed with TNT is that a USB mouse does not work. The cross appears in the middle of the screen but it cant be moved. (This worked fine in FolioMod1.4)
Anyway, the rest of the system is prettyyyy sweet! Thanks for all the great work
sergi711 said:
I have a question !
It's really necessary to have installed battery guardian ?? I want to be noticed with a sound if I have a new notification. Folio is going to deep sleep if i don't install battery guardian too ?
Click to expand...
Click to collapse
When the tablet is in hibernate state wifi is disabled, so youl'll get no notification for new emails. For all the other notifications (alarms, calendar and so on), battery guardian has nothing to do with them, as it only closes network connections. And yes, hibernate works without battery guardian too, but I noticed frequent unwanted wakeups without it.
Yesterday I configured my Folio exactly as described in the first post.
So far so good and all works well, but it seems, that this configuration drains the battery quickly and the battery was empty after 9hrs of standby (from 65 percent remaining).
Anyone got a solution for that, i.e. extending the standby time?
hallo,
i installed different kinds of android (SD version) on my HTC HD2, lastly i decided to use the MccM HD V6 SD SENSE FROYO and im very happy with that.
but ive got a problem: when im using flight mode while sleeping (usually 6-8hours), the battery loses 40-45% charge.
here is the situation:
- when im turning the device off and on again before using flight mode (means boot to wm6.5 artemis and then launching android, activating sim card and then setting device to flight mode) it tages 3-5% of charge during the night.
- when i do NOT reset the device, just enter flight mode after using the phone the whole day (facebook, google maps, ...) then the battery loses 40-45% charge as said before.
so the problem might be an application, which - once it is startet - always tries to connect when im flight mode. i startet using zdbox with autokill on lock, later also autokill system programs - no sucess.
lately i tried batteriefu, but this only stopped my data traffic/connection right now.
i have no idea, what to do against that. a friend told me, its not necessary to use taskkillers at all in android - whats your opinion?
maybe the SD android is a problem? (when programs use the SD card during night, it drains the battery?)
thnx in advance
markus
ps: sorry newbie, first thread in this board - when im doing wrong, just tell me - it was not on purpose.
Battery drain
wHY NOT JUST SWITCH THE PHONE OFF AT NIGHT????. Am I missing something??
Good luck
- galarm? (alarm use)
- and it takes time to go to wm6.5 and then launch android?
John, your shift key is stuck..
I can't help you directly, but SpareParts has a log feature that will tell you which applications cause the device to not enter sleep mode correctly (wake-lock), using that you should be able to locate the program causing the issue.
ok, spareparts was one of the things i uninstalled
spareparts or spareparts+?
thnx!
Normal spareparts should be able to do it (at least the one that came with my CM7 does)
ok, installed it, checkt the logs, loading battery and testing this night
interesting, last 2 nights there was a batteryloss of only 3-4%.
no idea why...
I've heard of roms / kernels taking a couple days to settle before some of the kinks go away, so it might be something of that sort. Otherwise I would assume your phone should be saving power if it's not connecting to networks as frequently
VVarboss said:
I've heard of roms / kernels taking a couple days to settle before some of the kinks go away, so it might be something of that sort. Otherwise I would assume your phone should be saving power if it's not connecting to networks as frequently
Click to expand...
Click to collapse
Y'know, I thought it was just me thinking this but I have noticed better performance once RevolutionROM has been in for 2 days or so.
I know there is politics for posting on a old thread but I saw this thread on Google while trying to see if this happened to anyone else.
I would like to report that right before bed I had 22%. My Samsung Skyrocket will eat right through 22% overnight if the cell radio is on. So without rebooting I turned on airplane mode (so I would have an alarm in the morning.) I woke up and my battery was at 28% I couldn't believe it. I will try to re-create this again. This was from 2am to 7am. In my battery details graph it even shows a little "hill" noting the increase.
I did hit the Task Killer button from my ES Task Manager widget right before airplane mode to make sure Facebook and Email were closed.
Any Input?
Have you tried betterbatterystats? I had high drain with new rom and seems to have been Audiout_2 which was started by the keyboard click. It was on by default in the ROM. Its off now and all is OK. Seems once it starts it must be continuously polling.
Sent from my HD2 using the power of Jelly Bean
Hi, just updated to 2.3.3 stock rom, no flash, using the standard LG upgrade software, from v10q (I believe) to v20g.
I installed no new apps, didn't change a thing on my phone, but now my battery drains in 12h of no use, screen off.
Battery information says the phone never goes to sleep anymore, the blue bar is continuous.
I've tried shutting down running apps using both the phone's built in app manager and Advanced Task Killer, doesn't change a thing.
Searching the forums, I've found people with battery drain, but never the same issue or solution so I'm hoping someone might know something more on my specific situation.
Here's how I use my phone and what apps I generally have running:
Audio Manager Console and Advanced Task Killer are always running, I keep data off most of the time, and turn it on when I use it occasionally (usually no more than a few minutes at a time), no wi-fi, most of the phone usage comes from Think Free Office (at least since I upgraded 2 days ago) and a few minutes of calls. Brightness is always on min.
This is mostly how I generally use my phone all the time (throw in a couple of hours a day of Bluetooth music using the default music player, but this hasn't been the case since the update) and I used to recharge every 2-3 days. Now it's 2 times a day.
Before the upgrade my phone would barely burn any battery in idle (maybe 1-2% during the 12 hours, as opposed to 94% as it currently does)
Battery health seems fine, temperature is around 20-25C
What can I do?
cable36wu said:
Hi, just updated to 2.3.3 stock rom, no flash, using the standard LG upgrade software, from v10q (I believe) to v20g.
I installed no new apps, didn't change a thing on my phone, but now my battery drains in 12h of no use, screen off.
Battery information says the phone never goes to sleep anymore, the blue bar is continuous.
I've tried shutting down running apps using both the phone's built in app manager and Advanced Task Killer, doesn't change a thing.
Searching the forums, I've found people with battery drain, but never the same issue or solution so I'm hoping someone might know something more on my specific situation.
Here's how I use my phone and what apps I generally have running:
Audio Manager Console and Advanced Task Killer are always running, I keep data off most of the time, and turn it on when I use it occasionally (usually no more than a few minutes at a time), no wi-fi, most of the phone usage comes from Think Free Office (at least since I upgraded 2 days ago) and a few minutes of calls. Brightness is always on min.
This is mostly how I generally use my phone all the time (throw in a couple of hours a day of Bluetooth music using the default music player, but this hasn't been the case since the update) and I used to recharge every 2-3 days. Now it's 2 times a day.
Before the upgrade my phone would barely burn any battery in idle (maybe 1-2% during the 12 hours, as opposed to 94% as it currently does)
Battery health seems fine, temperature is around 20-25C
What can I do?
Click to expand...
Click to collapse
Use apn on off widget to kill ur connection when u don't nees it...its a known issue known as the fastdormancy bug, which when u turn off data it makes ye phone awake. Apn on off is the easiest solution know...
Sent from my LG-P500 using XDA App
Thanks, will try, update results
Hi all!
I'm working on a cool University project here in Russia.
We have to make a mobile device that works for about a month without any charging.
Device should only wake up every day at 23:55 and send POST request to server to tell that "I'm doing science and I'm still alive.".
We've started with an Android device, ZTE racer and installed Cyanogen firmware.
We've made an application that:
enables AIRPLANE_MODE
asks AlarmManager to wake up at 23:55 every day
at 23:55 it disables AIRPLANE_MODE for a minute, aquires a wake lock for a minute
then sends "I'm doing science and I'm still alive." to server
and enables AIRPLANE_MODE again to save battery.
Right now we are getting 5-10 days of battery life.
I suppose that we could extremely increase battery life by:
removing some applications from firmware including "phone" and others
shutting down some services right in kernel sources. (In fact, we just need gprs and nothing else. We don't need Wifi, eccelerometer, GPS, ...)
decreasing CPU speed from application
I have couple of questions:
Is it theoretically possible to have 1 month of bettery life for an Android device? (I know that Kindle have more than 2 months of battery, so why we can't?)
Does anybody have an Android-based book reader? How long could it live in sleep mode and wifi turned off?
If device has no 3rdparty application installed, and it's sleeping in AIRPLANE_MODE... Who could possibly eat battery at that time?!!
Could you please give any kind of advice for our problem?
Thank you very much in advance!
I'd say yes it's possible to get that much battery life... Some suggestions from the top of my head:
Undervolt and/or underclock the processor (like you said), but do this from the kernel, rather than an application.
uninstall any unecessary system apps/turning off services (like you said)
Assuming your script/application is checking the system time of the phone to know when to wake, try having it just run an internal timer instead... I don't know how much battery life that would take, but I imagine that checking against its own timer would save battery vs requesting the time from the phone itself.
Assuming you haven't already, Try having so the display NEVER TURNS ON without physical input (i.e. pressing a button on the phone). The screen is a massive battery drain.