If you are looking for a keyboard case for the fifth generation 9.7 inch Apple Ipad, consider the Logitech Slim Folio.
This Bluetooth enabled case protects the rear and the display of the iPad.
Open the case, lock the iPad onto a magnetic stand on the front flap and you can start typing like it is a laptop.
It has large keys that are well-spaced and stretch from edge to edge for easy typing. Its replaceable coin-cell batteries are supposed to last up to four years.