lisa3070, I just got back from putting your Manker A01 in the mail. Expected delivery is Saturday, I’ll PM you the tracking number. I will certainly test the XTAR with an Alkaline, a Lithium, and I will rerun your test with one of my new Eneloops. (Just for consistency, not ’cause I don’t believe you.) I feel like I’m getting the better deal, because the XTAR appears to be 14500 capable as well, so I can use my spare purple eFest from my X5. So I’ll test it with that as well.
I played around with the Manker A01 a little before packing it up - I even found a box with the spare o-ring and split ring. Moonlight is pretty low. However, if you let your eyes dark adjust, you can easily maneuver around a small room with it doing a ceiling bounce.
Hmm, now then, how do I go about testing run times…
Arduino with a light sensitive resister maybe