Get it all: High-intensity performance, compact sizing and rechargeable convenience come together in the Strion® system. C4® lux LED bulb ensures ultra-bright, shock-resistant, long-lasting performance (up to 50,000 hours). Multi-function tactical tail switch gives you immediate access to high, medium, low and strobe settings. Sealed, IPX4-rated aircraft aluminum tube provides splash and weather-related water resistance. Optimized voltage/current regulator maintains beam intensity, minimizing the potential for flickering and fading. Charger's on-board safety control circuit prevents over-charge-related battery damage. Battery Type: Lithium Ion; Flashlights Type: LED; Power Source(s): 3.75V Lithium Ion (Included); Voltage: 3.75 V.