This Ultrafire  C5 - version 2 - LED flashlight is modular, the middle section can be removed. With the middle section in place, the light is configured for use with two AA batteries. With the middle body section installed, the light is configured to operate on a single CR123 or RCR123 battery. This is a direct drive 3 watt light which has an output of about 90 lumen on 2xAA and about 125 lumen on a single RCR123. A removable pocket clip is handy for keeping the C5 secured in your pocket while working.

This light is a single mode (ON/OFF) and operated by twisting the head. 

This C5 comes stock with a CREE P4 emitter and is easily upgraded using a 12mm emitter board. The driver board can also be easily upgraded if desired.

Dimensions
Length: 2.45" / 6.3cm
Diameter: 0.77" / 2.0cm
Weight: 1.66oz / 46.9grams