The Olight TC titanium flashlight comes with two battery tubes, one for a 14500 cell and one for 16340.
I have only ever used the light with the 16340 tube and the spare had been sitting in a box for a couple of years.
This seemed like a waste of good titanium so... 8^)
I filed out the tube to accommodate a 16340 cell and drilled a hole for a 16mm reflector in the end cap.
I used a pill module from an OTR M3, added a green LED for the lighted switch.
Still has the red LVP indicator.
XP-L2 HD v4 3C on 16mm KD DTP
ARC glass, Brushed reflector
M3 OTR driver
Lighted electronic side switch
Lockout-able
Magnetic tail
Graphite aesthetics
Max - 730lm OTF
67mm x 21mm
Weight - 64g with 16340 cell