Save money over the cost of standard batteries with the Streamlight Enduro Pro USB rechargeable headlamp. You'll always have the light you need with Spot and Flood beams, each with high, medium and low modes. Spot gives you a bright, focused beam and Flood gives you soft, area illumination that won't tire your eyes on a long job. It's tough, polycarbonate thermoplastic construction with elastomer over mold with unbreakable polycarbonate lens that is recessed to prevent scratches. Remembers last mode used and defaults to low beam when powering on. Limited Lifetime . 2000 mAh lithium polymer battery recharges in approximately 4 hours dependent of output port voltage. High Spot: 200-Lumens; 2, 080-Candela; 91m beam; runs 6. 25 hours. Medium Spot: 90-Lumens; 890-Candela; 60m beam; runs 19 hours. Low Spot: 25-Lumens; 250-Candela; 32m beam; runs 48 hours. High Flood: 145-Lumens; 220-Candela; 30m beam; runs 7 hours. Medium Flood: 50-Lumens; 80-Candela; 18m beam; runs 21 hours. Low Flood: 15-Lumens; 30-Candela; 11m beam; runs 48 hours.