From the Manufacturer
The 3V CR123 Streamlight lithium battery is the best as a replacement for any standard 3-volt (123 CR123 123A) lithium battery. These Streamlight lithium batteries are extremely popular for flashlight and digital camera use and will work just fine for any device that needs a standard 3V lithium battery. These batteries can be used in flashlights, film and digital cameras, and any other device that uses the following battery models: 123A, CR123A, CR123, CR17345, K123A, VL123A, DL123A,5018LC, EL123AP, SF123, and SF123A 3V. These are the replacement battery of choice for Streamlight Scorpions, Streamlight Twin-Tasks TT-1L, Stream light Twin Tasks 2L, Streamlight Tactical Lights TL-2, Streamlight Tactical Flashlights TL-2LED, Streamlight TL-3 Tactical Lights, Streamlight Tactical Flash-lights TL-3 LED, Streamlight Night Fighters NF-2, Streamlight Night Fighter Flashlights NF-2 LED, and Streamlight Tactical Gun Mount Flashlights. These are a 3-Volt CR123A lithium battery with a shelf life of nearly 10 years.
Replacement lithium battery for Streamlight Scorpion, Twin-Task TT-1L, TT-2L, TL-2, TL-2LED, TL-3, TL-3LED, NF-2 Flashlights (some lights require 2 batteries).