Basic Power Management:
Quickly and easily turn on, off or adjust key setting such as screen brightness, timeout, Wi-Fi, and Auto-Sync with a single tap by adding the Power Dashboard to your home screen. Press and hold an open spot on the home screen, select "Settings (HTC)" from the widgets drop-down list, then select "Power Dashboard.
Monitor your battery usage stats to see what's consuming the most power. In Settings, tap Power > Battery use. As with any computer, you want to make sure you have the most recent, available updates. This is no different for your HTC Phone, where these software updates sometimes include battery usage improvements. In Settings, tap About > Software updates.
Continually syncing unused services impacts overall battery performance. You can customize your settings and sync only essential items in Accounts & sync under the Settings menu.
Selecting "Smart Sync" in Mail settings ensures you update e-mail based on how you use your phone. This helps preserve batter life and also avoid interruptions when you're playing videos on your phone or when you leave it idle at night.
When you're not jumping from one city to another, sync weather updates of only your current city, rather than in all of your named locations. In the Weather app, tap Menu > Edit to remove unneeded cities.
Managing Wireless Connections:
Bluetooth, Wi-Fi, and GPS LOVE the battery. Turning these features off when you're not using them will help you maximize battery life. Slide the notifications panel, and then tap Settings to see the items to disable.
Your phone uses up more power in low coverage areas. Check your network signal, and then select an appropriate network mode in Mobile network settings. Or, turn it off when you're not connected to a network.
Connecting to location services uses more battery. Be sure to close the navigation app, such as Maps and Locations, after using it on your phone.
Managing Your Display:
Adjust your display settings. Lower screen brightness when playing music on the lock screen. Or set the screen timeout to a shorter time (if you don't manually turn off the display).
Create a Basic scene for your home screen in All apps > Personalize > Scene. Add your favorite shortcuts, remove extra home panels, and choose non-animated wallpaper. Use this scene when your power is going low. Then switch to your regular home screen when you've recharged.
Set your phone to auto-dim the screen while webpages load. Open the Internet app, tap Menu > Settings > Accessibility > Dim screen during page loading.
Managing Your Apps:
Uninstall or disable apps you don't use. In Settings, tap Apps > All, and then select the app to uninstall or disable. (Note that if you disable built-in apps, other apps may misbehave. So do this sparingly).
Check your apps' settings as you may find more options to optimize your battery. In Play Store, for example, tap Menu > Settings, and then clear Auto-update apps and Auto-add widgets.