Turn off radio communications that you aren’t using, such as Wi-Fi, Bluetooth, or GPS.
Turn off automatic syncing for Gmail™, Calendar, Contacts, and other apps.
Some apps you’ve downloaded may consume high amounts of battery power. While using your downloaded apps, check the battery charge level and monitor the battery usage.
Lower the screen brightness setting and set a shorter screen timeout.
Allowing other devices to use your tablet's hotspot connection will also drain your battery more quickly.