Logitech  diNovo Edge, DiNovo Mini, Y-RAY81, 190304-2004, F12440071, M50A, battery replacement For the Logitech Keyboard Replaces Logitech batteries 190304-2004, F12440071, M50A To fit Logitech Keyboard Logitech  diNovo Edge, DiNovo Mini, Y-RAY81 This 3.7v battery is designed for the Logitech with a capacity of 950mAh , it is manufactured by our ISO 9001 certified supplier to a very high standard. As we supply a very large range of batteries we cannot always have stocks of the slower moving lines as batteries have a shelf life and we insist on quality control for our customers, which may mean slightly delayed shipment date, where this is necessary you will be advised by email. Battery Type: Li-ion Battery Voltage: 3.7V Battery Capacity: 950