Turn off Bluetooth. Unless you are typing away in front of your iPad 2 with a Bluetooth keyboard, it's highly likely that you can do without Bluetooth for a time. Go to Settings > General and Bluetooth will be the fourth item listed. Set the slider to Off.

Turn off Push Mail and fetch data manually. The more frequently email or other data is pushed or fetched, the quicker your battery may drain. To turn off Push and to fetch new data manually, go to Settings > Mail, Contacts, Calendars > Fetch New Data and set Push to Off. Then set Fetch to Manually. Messages sent to your push email accounts will now be received on your iPad based on the Fetch setting rather than as they arrive.

Turn off GPS. Applications that actively use location services, such as Maps, may reduce battery life. To monitor location usage, go to Settings > Privacy > Location Services. You can see which applications have recently used location services (a key at the bottom of the preference pane explains each icon). If you see an application that you do not expect to be consuming battery power by using location services, you can disable by setting the switch next to the application to Off. To disable all location services, go to Settings > Privacy > Location Services and set Location Services to Off.

Disable ping. Ping, Apple's social networking music service, is enabled by default in iOS 4.3. It has been widely accused of adversely affecting battery life. To turn it off, go to Settings > General and enable Restrictions. Enter a four-digit passcode, and slide Ping to off.

Adjust your iPad brightness. Managing the screen brightness is the best way to extend iPad battery life. Auto-Brightness adjusts iPad screen brightness based on ambient lighting conditions, therefore minimizing battery drain. Adjust your brightness when indoors in a nonbright environment by going to Settings > Wallpapers & Brightness and dragging the slider to the left to dim. After making this change, turn Auto-Brightness off and then on again to reset to the default behavior.

See more: http://trendymediablog.com/2014/06/tips-to-save-ipad-battery-life/