toddcshoe, thanks for the feedback! I’m curious what 18650 (brand/model) did you try for the diameter? was it protected?
The reviewer from Poland tried an 18650 for diameter and it did fit, but he said a protected cell would not. Also someone replied in his (same) review on CPF that an18350 did fit, I just wanted a 2nd confirmation.
I was also interested in the E40R but as I recall there was something about the UI that was a deal breaker for me, E20R must have a different UI.