HC50 (HC50 + NL186 + D2 Charger + Keychain Light) Purpose-designed for hiking, climbing, camping and general outdoor recreation Powered by a single 18650 lithium-ion battery for up to 565 lumens of output High-efficiency circuit provides up to 400 hours of runtime All metal high-performance dual-beam headlamp Include your choice of Nitecore D2 Charger & batteries