SUREFIRE XSC-B

From Surefire:

Output: 350 lumens
Runtime: 30 minutes
Peak Beam Intensity: 2,000 candela
Distance: 90 meters
Construction: Aluminum
Finish: Mil-Spec Hard Anodized
Weight (w/batteries): 2.0 oz (48.2 g)
Length: 1.94 inches (4.9 cm)
Bezel Diameter: .78 inches (1.9cm)
Batteries: One proprietary B12 rechargeable lithium polymer 3.7V battery (extra batteries sold separately)
Battery Charger: One CH21 dual-bay charger (included)
Switching: Ambidextrous momentary-on/constant-on