Originally Posted By: comms

Before going with SPOT I was heavily swayed by ACR. In fact I still carry a very old, but reliable rubber button ACR Firefly strobe that ran on those lipstick style mercury or lithium cells before I converted it to CR123.

Comms, how would one go about making that conversion? I have some of the same units - still functional with the original fifteen year old batteries, but I would like to keep them working...
Geezer in Chief