Battery:Nickel-cadmium 3.6 Volt, 1.8 amp hour, sub-C; rechargeable up to 1,000 times.Bulb:3.7 Volt, 6 watt, xenon gas filled bi-pin; spare bulb in tail cap.Material:Machined aluminum housing anodized against corrosion inside and out; unbreakable polycarbonate lens.Color:BlackWeight:(with battery) 10 ouncesLength:7.4 inchesRun Time:1 hour of continuous use between chargers.Candlepower:Up to 15,000NOTE:The charge time of the fast charger is 2.5 hours, as opposed to 10 hours for the regular chargers.