Kill Background Data
Apps such as Gmail and Twitter receive data updates in the background constantly, which sucks up juice. Turn off background data updates to keep your device going. Settings > Accounts & Sync > deselect Background data and/or Auto-sync.
Turn Off Radios You Don’t Need
Unless you’re perpetually lost, GPS doesn’t need to be active 24/7. The same goes for Bluetooth and Wi-Fi. Turn off these resource-hungry radios unless they’re necessary. Settings > Location > GPS Satellites to change GPS. To change wireless presets, go to Settings > Wireless & network settings > Wi-Fi settings. For Bluetooth, click Settings > Wireless & network settings > Bluetooth.
Take charge of your smart phone’s CPU by controlling what apps use up its resources. Go to Settings > Applications > Battery Manager. Then tap the battery image to see what apps and device settings are draining too much power.
Disable Haptic Feedback
Vibrations when typing or making menu selections can be reassuring, but cutting off haptic feedback adds more stamina to your battery. It can also speed up text entry. Settings > Sound & Display > deselect haptic feedback.
Adjust Screen Timeout
The sooner your display goes black when you’re not using your Android phone, the longer your battery lasts. Settings > Sound & Display > Screen timeout.
Adjust Auto-sync Frequency
Some apps auto-sync based on a time interval you determine. To maximize battery power, set to sync less often. Try looking in the settings options for apps such as Facebook, Gmail, Google Reader, HootSuite, and Tweetdeck.
Turn Off Animations
The movement you find on home screen wallpapers and inside some apps is cute, but it can prevent a solid day of use. Get serious, and turn them off. Settings > Sound & Display > Animation > select No Animations.