There is a lot of frustration out there when it comes to the battery life of HTC Desire, i myself don’t see it as a issue since i have no problem in getting my battery to last for around three days. (While others again barely lasts two hours) So here i have gathered up my tips on how to increase the battery life of the HTC Desire. (These tips should also work for any other Android phone)

1) Use the sleep mode
As long as the display is turned off, the phone is in “sleep mode”, thus using less power. (You will still receive SMS and phone calls in sleep mode)

2) Turn down the screen timeout
Screen timeout decides how long the phone should be idle before the display is turned off and the phone goes to sleep. I myself have set this to 15-30 seconds. You can change this under settings -> Sound & Display

3) Turn down the LED back light
No reason to keep the back light on full power now is it?  Under Settings -> Sound & Display -> Brightness you can choose to either use automatic brightness control or set it to a standard strengt yourself.

4) Install Advanced Task Killer
When you leave a program in Android, the program still runs in the background. Which is not a good idea for some apps that like to run regular updates etc while running. So use Advanced Task Killer to get rid of those resource hoggers.

5) Deactivate wireless/GPS/Bluethooth/etc
If you dont use some of those features, simply turn them off. For example the wireless system will scan for networks pretty often and will that way hog quite a bit of power.

6) Check out the Battery info
Under Settings -> About Phone -> Battery -> Battery use, you get information about what apps that uses the most power. On my phone it`s the android system itself.

7) Set Wi-fi to automaticly turn off
There is a “hidden” feature called Wi-Fi sleep policy, where you can deside when the Wi-FI should go to sleep. (As you might know, Wi-fi is one of the things that eats the most battery). You can change this under Settings -> Wireless & networks -> Wi-Fi Settings -> pressing the menu button -> advanced -> Wi-Fi Sleep policy

8 ) Disable / Change auto sync of apps
Under Settings > Accounts & sync, you have the ability to either disable all syncing of apps, or even changing them on a per app level. Do you really need to update stocks/weather each hour?

9) Consider emptying your battery
I have gotten some reports that using your phone all the way until the phone dies (aka: the battery has been emptied), then recharing it, can have a rather extreme effect on how long the battery can hold.

10) Use a dark background
The desire uses a OLED screen. OLED uses more power to display bright colors, so you can save some powers by using a dark background.

Got any other tips? Feel free to share them here, and i will add them to the list