How to Extending an IPads Battery Life
(1) automatic settings for Wi-Fi and mobile data are a no no
A big battery drain is when your IPad searches for connects to the mobile or WiFi network with the strongest signal. If you're doing offline work them turn off the WiFi settings.
You can do this by going to “Settings” > “WiFi option” or “Cellular”, and tap ‘”Off”.
(2) Control how often data downloads happen
Some data hungry apps can really blitz your battery. Data in some apps are updated regularly, including the RSS feed and email notifications. The more often data is fetched the bigger the drain.
You may go to “Settings” > tap on “Mail, Contacts, Calendars” > “Fetch New Data”> tap “Manually”. Or "hourly" fetching can also be used.
(3) Screen Brightness
A bright screen is obligatory for bright surroundings ,but it's not always necessary and one of the biggest power suckers. Adjust your brightness to comfort levels and save your battery life.
Go to “Settings” > “Brightness & Wallpaper” > “Auto Brightness”
Now your IPad senses the ambient light and adjusts accordingly.
(4) Turn off Push notifications
If youre a power user and love being connected you would benefit from this step. Push notifications can be a huge battery drainer.