Refuelergy 9 Volt Li-Ion Rechargeable Battery HIGH CAPACITY 550mAh 9V Block
Almost all 9V Alkaline, Ni-Cd, Ni-Mh & other Li-ion Batteries! HIGH Capacity: 9v600mAh (Will NOT affect battery compatibility). Battery Type: Li-ion. Integrated microchip prevents overcharging & lengthens battery life!