High Quality, high capacity, light weight rechargeable DC 3.7V Li-Ion 1300mAh battery. Longer battery life than the original battery that comes with the remote. No memory effect. Can be charged or discharged as needed without loss of capacity. Overcharge protection, with built-in battery life microchip. CE Certified. Compatible with: Logitech Harmony 1000 Remote 6 months Manufacturer warranty.