9 Amp Hour Nickel Metal Hydride Battery Pack with Acrylic canister and charger Voltage: 13.2 VDC Capacity: 9 AH Dimensions: 3.75" D x 7.5" L / 9.52cm x 19.1cm Buoyancy: -2 lbs / -.9kg Material: Acrylic Burn Time (with HID-10MR): 8.5 hours