The iPad has an internal rechargeable battery. It has been designed to not be accessible by the user and should only ever be replaced by an authorized Apple Service Provider.
Charging the iPad Battery
The iPad battery icon appears in the upper-right corner of the status bar and shows the current battery level or the charging status.
It is best advised to use the mains power adapter to charge your iPad, this combines a USB cable and a 10W USB power adapter. You can plug the iPad straight into a USB port on your MaC or PC bit it will take much longer to charge up, especially while syncing.
iPad Troubleshooting – Replacing The Battery
All rechargeable batteries have a limited number of recharge cycles and will eventually need replacing. The iPad battery is not accessible by the user, so you will need to have it replaced by an authorized Apple Service Provider.
Increase Your iPad Battery Life
To help keep your iPad going for as long as possible there are a few things you can do to squeeze every last drop of power out of it. Firstly set the screen brightness to as low as you can without hindering your usage. Go to Settings > Brightness and adjust accordingly. Also make sure you keep your Bluetooth and Wi-Fi turned off at all times and only use it when you really need to. Lastly turn the sound off if you aren’t listening to music or watching a movie.