The H.I.D. lamp system with 4.0Ah NiMH battery: Unbelievable power in a package that takes up less space than similar existing systems. 4 Straight hours of light as bright and white as the sun, mounted on your handlebars, aimed right where you need it. Combined with a 3.5hr MicroBrute charger and 27oz 13.2v NiMH battery pack. 24 hour racers say this is the best light available. Features:Ultra Bright Metal Halide Bulb, New SurLok Connectors, MicroBrute™ 3.5hr charger with In-Vehicle charging optional CamLok™ QR Handlebar mount, Waterbottle style battery pack, 4.0Ah NiMH battery pack. System weight: 34 oz (mount, head lamp and battery)