Database Users

[Solved] Battery usage

So im trying to figure out where my battery is draining to... I cannot go a full day on a battery charge and its really annoying at night it jsut dies and plus i cant really do too much on it for fear of battery drainig itself. Is there a way.. i can check to see what might be taking up battery
Wifi off
GPS Off
no 3G in the US
Bluetooth Off
Push Mail off... (though am syncing 3 mail accounts every 2 hours... minimal mail though)
Internet usage 30 minutes (besides, weather stocks)
Phone usage .. about 60 minutes in the day
Gyrator on
General usage.. games, tinkering etc (60 minutes... hey its still relatively new)
Appreciate the input.

Strange..
I've got two mail accounts, talked for 15 minutes with a bluetooth headset (been connected all day).
From 06 in the morning until now at ten in the evening I still have 7 bars on the battery. (three in the TF3D)
Consider doing a hard reset and set up stuff and see if that helps..

After tinkering for a couple of weeks, I hard reset and just put back on what I want. I also used Tweak HD which has a few tweaks to lengthen battery life. It made a big difference to me.
Orinigally it had drained in about 18 hours, afterwards it went slightly over 40 hours.

this is strange - i use my phone alot and it easily lasts 2 days
have you tried replacing it? when i bought my first diamond it was faulty, replaced it and batteyr life changed
also try flashing a stock rom on again and see what happens - less than a day - defo not right!

diamond v hd
had 3 diamonds, battery was lucky to last 10hrs, ate 2680mA battery packs like jaws ate boats!
HD, charge 1 every 2 days.... huge improvement... would love it to last longer, but its a million times better than the diamond and thats all that matters...
HD battery life in conclusion, is great, and i do hammer my phone usage!

I'm seeing similar battery issues as the OP. I barely make it through a 12 hour day on a charge, although I get a lot of e-mail on 2 accounts (one checked every 15 minutes, the other every 2 hours). In an effort to track down battery drain, I downloaded and installed HomeScreen PlusPlus and find that at rest with screen intensity at 60% my HD draws 150 mA, with the screen dimmed at 10% it draws 70 mA, and in standby (blank screen) it's drawing 30 mA. When the data connection is active, it draws between 250-300 mA, and when using the phone with screen on about 400 mA. I figure that with those numbers and a 1350 mA battery, 10-12 hours is all I can expect. If anyone else is monitoring their battery draw, I would appreciate seeing your numbers for comparison.

Oooh this is a good idea...
anyone else done homescreen++ to find battery drainage.. im going to get to it this weekend...

Have the same issue.... I have nothing special installed and for some reason it drains very fast on basic features.....

Same issue here
Recently I've been getting less than 12 hours out of a full charge. I've uninstalled a few things and turned bluetooth and wifi off and today it seems better with about 80% left after 10 hours
Vaguely considering a hard reset if the problem continues...

have fixed certain aspects now using the new version of Tweak HD

For our benefit.. could you please tell us...
1) your version of Tweak HD
2) WHat did you do to improve battery life
Thanks

Progress
So I installed Homescreen++ to be able to monitor my battery utilization... and im averagin 150mA to 350mA with it being closer to 300mA most of the time... no wonder I am getting 10-12 hours of battery life.. and this is with the device not doing anything.. except cehcking mail accounts.. NOTHING else...
I really need help with this.. every night at around 9:00pm.. i am without battery and its driving me nuts...
short of a hard reset... what can I do to monitor what programs or processes are taking up my battery?

I really feel your pain. I must recharge during the day everyday. I've ordered a second battery, but it hasn't arrived yet. I've done all I can do with HD Tweak and Schap's Advanced Config, even turned the screen brightness down further to no avail. I don't want to hard-reset, but I'm going to give that a try this weekend. Before I do, If any of you experiencing good battery life has a few moments and is willing to install HomeScreen ++, please post your numbers to compare to ours (mine are in a previous post). The download link is:
http://www.chi-tai.info/cs_batterystatus_xda_neo_wm5_im_cs.htm#Download
It can easily be uninstalled through "Remove Programs" later.
Thanks in advance for your help; I am so enamored with this amazing device that I can't bear to give it up!

Battery life much better than my Kaisers...
​

Apparently Batti uses a lot of battery (ironically).
I've just replaced it with Ariel battery and will let you know how it goes:
http://forum.xda-developers.com/showthread.php?t=364278

I'm not running Batti.
I have been through an Apache, a Blue Angel, a Hermes and most recently a Kaiser before springing for this amazing Blackstone. All my previous devices made it through at least a full day before requiring a recharge.
My ROM is 1.14.405.3 and Radio is 1.09.25.14

I'm thinking of springing for the HD, I currently have a Hermes. Battery life is a major concern of mine, and on my Hermes I had to purchase a larger battery with the extended back plate.
Does the HD turn off the screen when not in use or is it on all the time? Also how does it do with WiFi on?

ent_doctor said:
I really feel your pain. I must recharge during the day everyday. I've ordered a second battery, but it hasn't arrived yet. I've done all I can do with HD Tweak and Schap's Advanced Config, even turned the screen brightness down further to no avail. I don't want to hard-reset, but I'm going to give that a try this weekend. Before I do, If any of you experiencing good battery life has a few moments and is willing to install HomeScreen ++, please post your numbers to compare to ours (mine are in a previous post). The download link is:
http://www.chi-tai.info/cs_batterystatus_xda_neo_wm5_im_cs.htm#Download
It can easily be uninstalled through "Remove Programs" later.
Thanks in advance for your help; I am so enamored with this amazing device that I can't bear to give it up!
Click to expand...
Click to collapse
I've got the same problem of the battery draining... i've just installed the plug in to monitor the battery and it's showing me 450ma when using opera through gprs ...isn't it a lot?please let us know if the hard reset fixes the problem
thanks

Tonight's the night
Gonna hard reset the little fella

What about WCDMA/GSM/Auto? Which one is better for batteryusage?

Poor Battery Life with WM6.5+Manila 2.5 or bad flashing

Hi guys
Just flashed the EnergyRom of Sept 23 yesterday - after playing with it all day incl the flash yesterday I drained the whole battery but that was kinda normal using WIFI a lot
Well I charged it last night and after it finished I switched off cos i dont use my mobile at night - now my phone has been on for nearly 12 hours only and merely used it to send a couple sms but its already on 60%
Is this due to the WM6.5 + Manila 2.5 combo cos its heavy on the RAM or did I do something wrong wen flashing?
I did hard reset twice before using the ROM - maybe nother hard reset will help? Any suggestion
Cheers

TC,
What else is running in the background? Is bluetooth constantly turned on? Is Wi-Fi constantly turned on? What mode are you in, 3G, GSM, etc? What is your screen brightness setting? Is it on auto, or do you have the brightness on manual?
How long before your screen turns off? How long before the backlight dimms? What applications have you installed?
A lot of factors come into play when you talk about battery life.
Cheers.
jpcicno6 said:
Hi guys
Just flashed the EnergyRom of Sept 23 yesterday - after playing with it all day incl the flash yesterday I drained the whole battery but that was kinda normal using WIFI a lot
Well I charged it last night and after it finished I switched off cos i dont use my mobile at night - now my phone has been on for nearly 12 hours only and merely used it to send a couple sms but its already on 60%
Is this due to the WM6.5 + Manila 2.5 combo cos its heavy on the RAM or did I do something wrong wen flashing?
I did hard reset twice before using the ROM - maybe nother hard reset will help? Any suggestion
Cheers
Click to expand...
Click to collapse

Hi,
I have no programs running in the background and have only installed two games and clean ram app
All connections (bluetooth, beam, wifi etc) are off
Im in 3G mode but its currently connected to EDGE (on duttys 3.9 ROM it was like this and sometimes i would find my phone connected to E and sometimes to 3G)
Brightness is on manual and more or less 4/10s of the brightness (my phone has been in standby a lot today)
I manually put the phone in standby when Im done using my phone
I use "clean ram program" sometimes (not today) after extensive use like WIFI and Games and my RAM is currently at around 60% and battery life fell by another 5%

And which ROM is it? I used the latest Energy 6.5 ROM for a bit and it was very heavy on the battery. Using 40-50% of the battery during the day. And that was with no WiFi or Bluetooth. Was just using the phone/text and a wee bit of email/web.
Cheers
Dazza

The guy who makes the EnergyRom put in previous versions, that it's a Ferrari rom, meaning it's fast but burns through a lot of gas (battery life). I used a rom from him as well, and it ran great, but my battery life was crap. I then decided to flash Dutty's latest rom about a couple of weeks ago, and it's been running great, AND has great battery life.

ah ic - I saw it had great performance but didnt notice that it was heavy on the battery
it is his latest ROM - thanks for the feedback

Also now using Dutty's latest ROM. Only issue is Home button doesn't really do much. Otherwise fantastic.
Cheers
Dazza

From 90% I am down to 20% by 1700h. I carry an extra battery around everywhere now since upgrading to WM6.5

Battery Life for HTC Touch Diamond2

Having recently bought and TD2, i really am getting a bit conserned about the battery life ....
Like it's awfull either that or it's just my phone thats gone the way of the dodo.
Can you please share your battery lifespan estimated ?

I bought device a week ago. Battery lasts up to 48 hours if I do not use it too much. If I do, or after several calls battery drains for 24 hours. I checked the settings. It is set to turn off device if not used after 1 minute. I have windows mobile 6.5 original rom.

I voted 72hours. screen off all the time when is not used. Win 6.5 dutty rom. about 20min call /day , 3g always off when not needed. Wifi about 15m / day.

I make a couple of calls on most days, send a few texts. my 3G is generally always on, I use the game/internet for about 15mins when on the bus. My battery lasts about 24hrs :-(

Mine will last a few days when not used much, but when I do use it, I use it.. haha so batter gets to less than 24h

original wm 6.1 rom; data connection off; 30min call/day; 40 sms/day. Screen off when not used: 72h battery life

Same as Psinok

i voted 48 but i believe it can be longer...
when i use regular phone uses (~1hour talking ~5-10 sms ~30min internet per day) battery drains about 20-30% for 24 hours
but if browse with wifi for long time if i use gps for couple hours or make long calls for hour or so it can take 30% at one time so its only depends on usage...

I really find it hard to understand why you guys get so fired up about battery issues!
All these guesstimates have little real world value other than to give some idea of what usage someone else, using their phone the way they do (whatever that may be), gets, in their subjective opinion.
Someone gets this, someone gets that and someone else gets the other. What difference does it make?
The only single usable value would be a phone life (given the ROM, battery age and charging procedures used) from full charge and left on without use until it turns off.
I did extensive tests along these lines with a couple of models of nokia phones a few years back, when the same disquiet about battery life surfaced then.
At the end of the day the main thing you can do to maximise battery life is charge it correctly. And then when you use, it once it's drained, it's drained!
So you charge it again. What you get is what you get. That's it!
If you want to see a huge difference then turn off manilla for a while (for those who are using it).

It's too hard to say exactly, but my battery life was utterly shocking in the first 3 to 4 weeks of owning it. Now, I get much better life.

It all depends...on your ROM
Same usage gives me 12h or 48h...
Some roms are very power hungry, I'm yet to figure out what causes that.
EnergyROM looks great, fast and nice colors but I only get 12h.
Same usage on Dutty's rom gives me 36-48h

Have used a lot of different ROMs but the battery life is usually pretty much the same. 3G always on. I talk in the phone for one hour a day. Sends 20-30 textmessages a day. Dataconnection always on (sync to exchange mail, facebook). My TD2 can easily go for 72 hours.....

pringe said:
Have used a lot of different ROMs but the battery life is usually pretty much the same. 3G always on. I talk in the phone for one hour a day. Sends 20-30 textmessages a day. Dataconnection always on (sync to exchange mail, facebook). My TD2 can easily go for 72 hours.....
Click to expand...
Click to collapse
Do you mind telling us what ROM you are using?

WM 6.5 Stock ROM
I recently installed HTC WM 6.5 Stock ROM on my Diamond2 and -on the average- a normal day consumes aroung 40 % - 50 % of the battery: couple phone call, several SMS, few minutes of WiFi use.
The battery lasted a little bit longer with WM 6.1 Stock ROM (shipped with the device).

GSM on Work, 3G on other time.
Data Connection avg ~30 mins a day
Music 2 Hrs
some games. (solitare...only)
Little to none calls
few SMSes
Batt: 100 -> 25% within 24hrs.
ROM: TESS PrideIV
Radio: Stock 4.49.25.17

Battery Drain HD2?

Anyone else experiencing excessive battery drain on their HD2?
I am interested to know if this is just my phone or if it actually just chews through that much juice.
I have had windows mobile phones for several years so I know all the basic ways to keep battery drain down.
Stuff that I have generally found:
1. If I keep the screen turned on without it going blank I lose about 1% every 2 minutes.
2. If I am browsing that figure almost doubles.
3. My old Touch HD used about 5% battery overnight when in standby but this phone will go through about 25%.
4. The phone gets really hot when browsing (much hotter than my old Touch HD)
I have tried flashing ROM's and Radios but nothing seems to help.
I am not running any software on the phone that I wasn't running on my old HD1.
I have only had the phone for a week so I am not sure if this is normal but I would be very surprised if HTC released a phone that lasts for only a few hours on one battery.

+1
-1% every 3 minutes
-4% during the night (when i'am sleeping)
MAXIMUM : 45/48 HOURS

Crash95 said:
+1
-1% every 3 minutes
-4% during the night (when i'am sleeping)
MAXIMUM : 45/48 HOURS
Click to expand...
Click to collapse
I wish I got 2 days

we really need extended battery ,hd1 battery was much more better.

Good mate but yes i agreee HTC has come up with a battery eating device this time around. My device on full charge just gives in around 8-10 hrs. This might be dat my EDGE is on and 7 mails accounts sending mails back and forth.
but truly i think that HTC better look into this very seriously cause more and more ppl are suffering in this battery drain..
Any of flashing roms and radio not helping either... did a complete hard reset but no step up
HTC come with longer battery battery for bigger devices soon......
The only solution i see now is get one of those extra battery worth mind bogling £52.87

I've had this problem ever since flashing to 1.66, I flashed the radio to 2.07.50.27 as this was said to solve the problem but it hasn't made any difference after a few days of use. My battery life used to be significantly better when I was on the original stock ROM, so much so I'm considering going back to it
I also know all the tricks as to clawing back the battery drain, my phone is idle on my desk at work most of the time and I don't use Wi-Fi, all the location stuff is turned off as are weather, stock and other updates plus my screen is set to 30% then off after 60 seconds. Despite all of that I lose 1% every 2-3 minutes
It seems to me that perhaps the radio is checking for reception pretty much constantly rather than say, 5-10 mins perhaps? This used to be a problem on my old Blackberry Storm but a few fimware updates solved it, eventually!
The only other thing I've noticed since the update is that once the battery drops below 50% or so, the drain seems to slow, I don't know if this is perhaps because the phone goes into some sort of semi-power saving mode?
Suggestions/hints welcome! I've had a semi-thorough look into this on the forums and tried most of the suggestions but still the problem remains. Will battery life improve after a few charges perhaps as this was a trait of my Storm's battery, the more you charged it the better the day to day battery life was (and no it wasn't because I had it plugged in all the time! Over time the general charge just seemed to improve when roaming).
Thanks!

Piemole said:
Anyone else experiencing excessive battery drain on their HD2?
I am interested to know if this is just my phone or if it actually just chews through that much juice.
I have had windows mobile phones for several years so I know all the basic ways to keep battery drain down.
Stuff that I have generally found:
1. If I keep the screen turned on without it going blank I lose about 1% every 2 minutes.
2. If I am browsing that figure almost doubles.
3. My old Touch HD used about 5% battery overnight when in standby but this phone will go through about 25%.
4. The phone gets really hot when browsing (much hotter than my old Touch HD)
I have tried flashing ROM's and Radios but nothing seems to help.
I am not running any software on the phone that I wasn't running on my old HD1.
I have only had the phone for a week so I am not sure if this is normal but I would be very surprised if HTC released a phone that lasts for only a few hours on one battery.
Click to expand...
Click to collapse
You need to indicate what services you have running. Do you have any data services running eg: location services, push mail, weather? all of these have a bearing. In addition, network services can also drain a battery, especially if the signal is weak and the phone have to search for a transmitter, or 3g services.

Hexjibber said:
The only other thing I've noticed since the update is that once the battery drops below 50% or so, the drain seems to slow, I don't know if this is perhaps because the phone goes into some sort of semi-power saving mode?
Thanks!
Click to expand...
Click to collapse
That is a very interesting comment. Although since upgrading to radio 2.07.51.05_2 I have had very good battery life, I too have noticed a slowdown after 50%

romac said:
You need to indicate what services you have running. Do you have any data services running eg: location services, push mail, weather? all of these have a bearing. In addition, network services can also drain a battery, especially if the signal is weak and the phone have to search for a transmitter, or 3g services.
Click to expand...
Click to collapse
Nothing is turned on, everything is set to manual.
As I stated I know all the basic stuff. I understand that all these things have a bearing on battery loss.
Everything I stated in the first post is for when I have nothing running. The phone is just sitting there running sense, thats all.

I have had my HD2 for a few days now. I am on Vodacom in South Africa.
I have not had a problem with battery life.
Yesterday i unplugged from the charger at 07:00. I spent about 1 and 1/2 hours of talk time on the phone, it was permanently connected to 3g doing weather updates etc. Sent and received a couple of sms's. Also played with a few tweaks and reboots.
When i got home at about 18:00 i had over 30% battery. I then surfed the web for over 2 hours to drain the battery.

try setting Network Selection to Manual

Piemole said:
Anyone else experiencing excessive battery drain on their HD2?
I am interested to know if this is just my phone or if it actually just chews through that much juice.
I have had windows mobile phones for several years so I know all the basic ways to keep battery drain down.
Stuff that I have generally found:
1. If I keep the screen turned on without it going blank I lose about 1% every 2 minutes.
2. If I am browsing that figure almost doubles.
3. My old Touch HD used about 5% battery overnight when in standby but this phone will go through about 25%.
4. The phone gets really hot when browsing (much hotter than my old Touch HD)
I have tried flashing ROM's and Radios but nothing seems to help.
I am not running any software on the phone that I wasn't running on my old HD1.
I have only had the phone for a week so I am not sure if this is normal but I would be very surprised if HTC released a phone that lasts for only a few hours on one battery.
Click to expand...
Click to collapse
Same here with and without stock ROM.

yeah.. the phone is a battery sucker.... another cons of HD2....

This is very interesting to read because I do not have this problem. When I left my HTC HD2 on last night (I woke up at 4 in the morning to get something to drink and unplugged it) and then woke up at 8, it was at 98%. That means it went from 100% to 98% in 4 hours. Not to bad imo.
I am now at work and it is 15:34, and I am at 87%. I have made some calls, watched some videos, send a few text messages. Not much (I am at work so I got other things to do). So 08:00 (98%) - 15:34 (87%) - that's 7 and a half hours, with some calls, text messages and a video.
I am pretty sure when I get home at 18:30 the battery will still be above 75%. Then I connect to my wifi at home, refresh twitter, weather, browse the web a little bit, check e-mail etc. So that will drain my battery a little more.
But overall I have not had any problems with my battery life. I always make it trough a day, and never have a problem like 'damn my battery is almost done and I am not near a charger'.
Some info that might help:
I do not sync ANYTHING automatically. I still have some things to do with my Vodafone contract and do not have an unlimited plan yet. I only sync at home on my own wifi connection. For me this is not a problem, because I only need to refresh the weather each morning to see what the day is going to be like. Twitter I only do when I have the time. Stocks I do not use.
I have screen brightness set to automatic.
I am on 3G most of the time.
I am running the official 1.66 Dutch ROM.
I have some tweaks, games and programs installed.
I hope you all solve this issue, because it just can not be that my HD2 has a good battery life, and your HD2 not
Kind Regards
EDIT @ 17:00 still 87%.

I am in a 3G 2100 only network (I don't have 2G functionality).
ROM: Artemis 3.0
Radio: 2.06.50.23_3
Customization: Seiya 6.5.5
I don't leave any automatic updates on, except for my e-mail account every 2 hrs.
I never close my connection.
The drainage overnight is -3% (8hrs).
The battery lasts at least 12 hrs of intense usage.
Normally I have to recharge every second day (e.g. I charged last night, I answered a few calls, I did some IM and browsing and I still have 73% left).
For a phone with a 1 GHz processor, a 4.3" screen and a tiny 1250 mAh battery I find the drainage is rather decent.
Mind you, I ALWAYS do at least one full charging cycle to my battery after flashing a new ROM. I mean: full discharge, battery out 1 min, full charging in OFF mode, battery out 2 mins.

27firesnake said:
Mind you, I ALWAYS do at least one full charging cycle to my battery after flashing a new ROM. I mean: full discharge, battery out 1 min, full charging in OFF mode, battery out 2 mins.
Click to expand...
Click to collapse
I have seen this process recommended a couple of times now. What is the theory behind it if you don't mind me asking?

maybe its also becouse some of us couldnt wait using the hd2 when they got it (like me) before it was fully charged for the first time
anyway my battery life has improved a little bit, i was at 74% this morning and did a lot of browsing, installing, tweaking and now its at 3%. it used to be much worse

I have battery consuming problem from time to time.I did everything:
installed new stock rom 1.66;
transfered all data which phone is using from card to phone memory(pictures,icons,sounds.etc...)
all updates are done manually;
Gprs connection is swiched off on the idle after one min;
One night it is loosing from 2 to 4%;
another from 30 to 40%
and it is eating memory from 10 to 15mb
I think that it is radio which is causing battery drainage so fast(to much communication wit a base stations,because when I am checking spb wireless monitor in the morning,there is no any data traffic.
I hope they can solve problem,because it is getting me mad and crazy

Try setting the screen brightness to 10-20% (on battery powered)
and dim backlight after 10 seconds (on batter powered).
It helps a lot, at least for me.

creed said:
I have seen this process recommended a couple of times now. What is the theory behind it if you don't mind me asking?
Click to expand...
Click to collapse
as far as i know, the battery has an integrated digital circuit (ic) which estimates the state-of-charge (soc). the procedure resets/calibrates the ic to obtain a more accurate estimation. since the radio rom is in charge with the power management (among other things), by changing it you decalibrate the "gauge".
i don't know if i've got the theory right but i tested this myself and it surely works.

battery life improvement?

hye,
I just bought a HTC leo which I really love.
but there is just one thing I'm concerned about, the battery life.
with my htc touch pro 2 I was able to use my phone 2 days before recharging but I can't do that with the htc HD2
IS THERE A WAY TO IMPROVE BATTERIE LIFE?
thanx

use less of your phone the hd2 drains the battery and is very good at that.
Or you buy another spare battery to switch with the exausted one when you're on the go, they're pretty cheap on ebay with a mains charger

only tips, would be turn all you're updates off, i.e, email, weather, twitter, stocks etc. screen brightness, not much else really, i get a full day out of my battery with everything turned on and full screen brightness so im happy

switch off 3G whenever there is no need for it, best is using a tool like wmlonglive to do this automatically. Will improve the battery live especially if signal strength is changing often between 2G and 3G

don't use windows live push mail, it will improve your battery dramatically
edward

my HD2 just takes 30 minutes to drop from 100% to 70 % .....
from the bottom of my heart , i want to say , htc fone ..... not good as they say ,
crap
battery drinker
just after some games , it hots ...............
will change other fone ,

I do not have a problem with the phone. it lasts me 2-3 days depending on where i am. thus depending on phone signal strength.
Further when you want to improve battery life look at the treads about that. there are so many with so many suggestions. quite a few have improved my battery dramatically. search and try.

@Felix
Are you using a Stock-ROM?
When yes, then install atleast BsB-Tweaks and activate the powersaving settings ... (the most cooked roms already have this settings)
It will bring some extra minutes/hours
My HD2 (fully loaded over night) is at 77% after 8 hours and some phone calls (ca. 30 minutes), sms and some gaming and surfing
@enchanter
yes, it drains the battery pretty good and yes its becoming hot when you play games or stuff ... but what is the problem with it?
We all knew this - before we bought a HD2

ha ha , Pliskinius has the coolest answer
" what is the problem with it?
We all knew this - before we bought a HD2 "
u right man ,

@ pliskinius: I don't know what a stock rom is... it is the rom who was installed when I bought it.
my battery lasts one day and a bit, so there is not really a big problem, but when you go somewhere and forget your charger...
@enchanter: I'm really pleased with my htc, its my 6 or so and they become nicer and nicer..
Pliskinius said:
@Felix
Are you using a Stock-ROM?
When yes, then install atleast BsB-Tweaks and activate the powersaving settings ... (the most cooked roms already have this settings)
It will bring some extra minutes/hours
My HD2 (fully loaded over night) is at 77% after 8 hours and some phone calls (ca. 30 minutes), sms and some gaming and surfing
Click to expand...
Click to collapse

Try this fully drain the battery until the phone shuts down then take out the battery for two minutes,put the battery back in (DO NOT TURN ON THE PHONE) and charge until the green light comes on, take out the battery for another two minutes then put it back in and start up, this should improve battery life.
Also other factors affecting battery life are the Rom version,Radio and HSPL.

nice idea @nosh - will try it too ... maybe it brings some extra minutes
@Felix
you are using a stockrom (stockroms are the original ones, wich are installed when you pick up a new phone)
get this little tool http://forum.xda-developers.com/showthread.php?t=589305 and activate the energysaving feature (will improve the battery life)

@ nosh 10: I'll try that thanks, but I heard that fully draining your battery is not a good thing.
@ pliskinius: haha, yeah I know I don't know a lot about WM

Laurentius26 ROMs get an excellent battery life. I get 2 days without deactivating anything. And everything works perfectly and smoothly. I have the 2.10.50.26 radio ROM and the Laurentius26 GoldEdition V2.0 Spike™ WWE 21899. Can last up to 2.5 to 3 days by deactivating 3G. I download weather every 3 hours, tweets every 4 hours, e-mail every hour. Then I make phone calls about 15 minutes per day, sms 10 to 20, pictures about 10, surf with Opera about 30 minutes per day. Remember also to close all unused applications (for me the best task manager is the Touch X manager that is on Xperia X2, lets you choose between short click on the cross to minimize the app and long click on the cross to close the app).
Edit : It's now 15:50. Was 100 % yesterday evening by 22:00. Now it's 73 % left. But I only used my phone since that time to make a countdown for cooking at lunch time.

I'm currently in Japan, using phone on 3G, very little use, listen to some music daily (30 min) and play around an hour. I'm getting 3 days easily without a charge and could easiy stretch to 4 days.
Back in my country I disable 3G and use only 2g with auto updates on every 3 hours, no email push no twitter whatsoever, just weather updates. During the night the battery drains down by 15% and with normal usage I'd have to charge daily.
15% during the night with maybe 2 updates during the night and data connection disabling just after a few minutes shouldn't drain the battery by that much. Dunno, but I'm pointing my fingers towards 2g.
I'm no expert, actually I'm far from that, but could it be that 2g uses more power from the phone?
Without any usage at all, here in Japan, I hardly get a 10% battery drain in 24hrs compared to 15% during the night back in my country.

Maybe new comm chips Edge eats more than 3G as all the phones are now optimized for 3G, I wouldn't be surprised at all.
But one thing is sure : if you have bad 3G coverage or bad quality signal, it really drains your battery. Only way to avoid this : disable 3G and you phone will stop changing from Edge to 3G or HDPDA several times per minute.

I'm using WMLonglife, and I've set it to 3g only. Now I have no idea if here in Japan they have HSDPA or Edge or if the software is keeping the phone on 3g, but I haven't seen the phone changing from 3g even when the reception went down to 1 bar.
But i'm pretty impressed with the battery life at the moment. Pity i won't have the same battery life back home.