The battery charge in your Logitech Keyboard Folio Mini will last up to three months when used for about two hours a day. High usage levels may cause the battery to not last as long.
We recommend charging your keyboard folio at least once a month.
NOTE: The Logitech Keyboard Folio Mini doesn't have a user-replaceable battery.
Please see answer 360023415633 for instructions on how to charge the keyboard.