2 Pack of L-LU18 Battery for Logitech Harmony 1100, 1000, 1100i, 915, F12440056 Universal Remote (1250mAh 3.7V Li-Ion) Harmony 1100 Battery for Logitech Harmony 1100, 1000, 1100i, 915, F12440056 Universal Remote Replacement Lithium Ion Rechargeable Battery Output: 3.7V Capacity: 1250mAh Quantity: 2 1 Year Replacement Warranty