FYI, finally got around to testing the auto-shut-off feature (8 clicks + PH). It does indeed last for exactly 3 mins, according to stopwatch timer. Pretty good little timer in there ...
I've decided to run the LF2XT on my keychain as EDC with auto-shut-off engaged and the head locked-out (on a L92 battery). This way, I don't need the over-discharge protection feature, since I'm not running a NiMH or Li-ion.
Do both your samples shut down at exactly 3 minutes? I have a Q4 that shuts off at 3min & 12seconds and a R2 that shuts off at 3mins & 8seconds. This is not a big concern just a point of interest.
I also EDC with atuo-shut-off on along with a L92.