Tod osier
WKR
Thanks, Tod.
I found the 18650 Store which has a lot of options and some good info.
The output and run times on Zebra's website makes me believe switching is in order.
Yes, if you use the high/high setting sparingly (as in only when needed - it is bright, often too bright), there is no issue with battery life. My standard setting for trail walking and camp chores is med/high and the battery is supposed to last 70 hours at that setting.