The Fenix TK15 uses 2 CR123 batteries to power the CREE XP-G R5 LED for a maximum of 337 lumens on high. The light is controlled by two switches, one on the rear for powering on and off and another on the side to switch modes. On the low of 5 lumens, the TK15 can run for an incredible 142 hours.

• Cree XP-G LED (R5) with a lifespan of 50,000 hours
• Uses two 3V CR123A Lithium batteries or one 18650 Li-ion battery
• 135mm (Length) x 25.4mm (Diameter) x 34mm (Head)
• 152-gram weight (excluding batteries)
• Digitally regulated output - maintains constant brightness
• Reverse polarity protection, to protect from improper battery installation
• Tactical tail cap switch with momentary-on function
• Anti-roll, slip-resistant body design
• Made of durable aircraft-grade aluminum
• Premium Type III hard-anodized anti-abrasive finish
• Toughened ultra-clear glass lens with anti-reflective coating