The TK22UE is a new version to a light that has been a staple of more than a few people's kits. While not much brighter, this TK22UE comes with a 21700 battery that is not just rechargeable, it is one of the highest quality li-ion batteries on the market.

This light is machined from durable aluminum, with a hard-anodized finish for extra strength. The anti-abrasive design of the knurled body keeps the TK22UE from rubbing bare hands raw while in use. The battery does heat up to a high temperature, so be wary of that during longterm use.

Features:

• Manufacturer's page: Fenix TK22-UE
• Digitally regulated circuit for maintaining a stable output
• Low-voltage warning alerts when battery replacement needed
• Reverse polarity protection prevents improper battery insertion
• Anti-roll and anti-slip body design
• Instant power activation with momentary tactical tail switch
• Simple output selection with side switch
• Made of A6061-T6 aluminum
• Premium type HAIII hard-anodized anti-abrasive finish
• Toughened ultra-clear glass lens with an anti-reflective coating

Specifications:

• Output modes: 21700 (18650)
  Low: 30 lumens/80hr (60hr); 167ft (51m); 739cd
  Medium: 150 lumens/17hr (15hr); 400ft (122m); 3721cd
  High: 500 lumens/4hr 40min (3hr); 758ft (231m); 13356cd
  Turbo: 1600 lumens/2hr 10min* (1hr 30min*); 1329ft (405m); 41133cd
• Dimensions:
  Length: 5.9” (150mm)
  Body: 1.0” (25.4mm)
  Head: 1.6” (40mm)
• Weight: 5.3oz (150g)(excluding battery)
• Battery: One 21700 rechargeable li-ion battery (included) or one 18650 rechargeable li-ion battery with the ALF-18 battery holder
• Included: ARB-L18-5000U USB rechargeable li-ion battery, USB type-C charging cable, lanyard, holster (length adjustable), spare O-ring, ALF-18 battery holder

* = Turbo runtime is calculated using entire runtime, after all built-in protection measures are used