[HTC Desire S] rayulove69:
Found a great guide on improving battery life in htc smartphones . Nearly doubled my battery life . Before this I used to run out after a good 18 hour but after following this even with heavy use I have 34% left after 22 whooping hours! So guys follow it and tell me your experience that how much it improves with your smartphone . I am assuming you have a sense rom and you have a perfectly calibrated battery already. If you dont please calibrate battery by charging it to 100% then turning off with fastboot unticked , then plug it in wall charger again to find it having green LED in about 20 seconds but keep it that way for 5 or more minutes then going into your choice of recovery (clockworkMod or 4ext) wipe battery stats and you will have a calibrated battery. Another precaution to look for is all the charging should be done by wall-charger(not via USB charge). So here goes the steps to double your phones battery life :-

1) With the Desire S switched on, charge the Desire S

for 8 hours or more . Your battery should be 100% by that time . If it is don't disconnect the charger . Keep it plugged in for 8 hours or more. It gives the battery time to cool down too so its a good thing.

2) Having unplugged the device from the power cable turn the

phone off(also look for that you have fastboot disabled, Settings > Power > untick Fastboot) , then charge it for a further one hour. Again your battery might be 100% but still have it plugged in anyway! 1 hour or a bit more.

3) With the device now unplugged turn it on for two minutes,

then again turn it off (remember to keep it unpugged during the turning on and off period) then

charge it for another hour. In this time your battery will show 100% or the Green LED will be on but still keep it plugged.

Oddly the end result is your battery life should be close to

doubled. So try it and report back here how it went.

Typical guide of improving battery life:-

1.Turn off Background Data syncing : Settings > Accounts &

sync > Untick Background data. You will come across apps that

you wlil turn this on for, make sure you turn it off when you're

through with the using the app.

2 Ditch Auto-sync : Settings > Accounts & sync > Untick Auto-

sync. This single handedly cost me a lot of money overseas with

data usage. It will eat your battery too.

3.Get rid of Vibrate: Settings > Sound > Untick Phone

Vibrate.

4.Turn Off Haptic feedback, it's largely unecessary unless you

must have it: Settings > Sound > Untick Haptic

feedback : Vibrate when pressing soft keys and on certain UI

interactions.

5.Lower Brightness: Settings > Display > Brightness >

Untick Automatic brightness > Reduce Brightness by sliding to

left.

6.Lower the Screen Timeout Interval: Settings > Display

> Screen timeout (default 1 min) > Reduce to less than 1 min (15

seconds minimum).

7.If you're out and about then you can disable WiFi : Settings >

Wireless & networks > Untick Wi-Fi.

8.Disable Bluetooth, who uses this these days anyway: Settings

> Wireless & networks > Untick Bluetooth.

9 Clean up the Running services: Settings > Applications >

Running Services > Select and Stop any apps that you are not

using, there are likely to be many!

10.Check the data options of the apps you have installed, many

can be customized to reduce battery usage: normally in Setting

options of each app. Change intervals / frequency of data pulls

or disable background syncing altogether. Pay attention to

Twitter clients, RSS apps and mail especially.

11. Disable always on mobile data. Settings > Wireless & Networks > Mobile Networks > untick Enable always on mobile data.(thanks ben_pyett)

12. If you are on GSM or 2G then . Settings > Wireless & Networks > Mobile Networks > Network mode > GSM only.

13. Use a Mobile network toggle widget to turn it on or off when not needed . It improves battery a lot as I find the latest radio to be a better battery hog in this case.

Follow the first guide closely . Second one is mostly already followed by average user.

Happy improving battery life! :-D

Sent from a darkly dreaming freak named Ray with a hTC Desire S in his hand which's rom is changed by the owner more than his clothes !