The batteries in your Logitech Tablet Keyboard will last up to 10 months with regular usage. Extreme usage will shorten the battery life.
To replace the batteries in your tablet keyboard:
Turn the keyboard over.
Locate the battery tray along the top of the keyboard.
Open the battery tray by pressing in the tab..
Remove and replace all four (4) AAA batteries (two on each side), inserting them in the direction shown in the image above..