Lowering the brightness, letting the display sleep when not in use, and keeping it simple helps save battery power.
Changing your wallpaper to a plain, black background can also help a little. The less color is displayed, the less battery is used.
See Setting your Home screen wallpaper.
Many apps run processes or sync data in the background even when you're not using them. If there are apps that you don't need anymore, uninstall them.
If an app came preloaded and can't be uninstalled, disabling the app can still prevent it from continuously running or syncing data. See
Disabling an app.
Background data and sync can use a lot of battery power if you have many apps syncing data in the background. It’s recommended not to let apps sync data too often. Determine which apps can be set with longer sync times, or sync manually.
If you are using the HTC Mail app, select an account, tap
> Settings > Sync, Send & Receive, and then adjust the settings under
Some widgets constantly sync data. Consider removing the ones that are not important from your Home screen.
To squeeze in a little bit more battery power, try these tips: