The REVEAL Lithium Cartridge can replace up to 1,000 AA batteries, keeping your camera on longer. This rechargeable pack can be charged through the included USB cable or by connecting to the new REVEAL Solar Panel. Stay in the know on your battery levels with a built-in battery level indicator for quick reference in the field. Replace up to 1,000 AA batteries, Integrated Battery Indicator Light, Rechargeable, Works with new REVEAL Solar Panel for additional recharging in the field.