Just to let you know, I just unscrewed my
sigelei and dropped in my Ultrafire XSL 28650 2600Mah
No problem with fit at all. It is actually 86mm long.
I believe the new Samsung/Panasonic 3400's would fit without any problem. I'm sure the high output for the eVic would fit. eVic has a plastic sleeve that restricts fit and it works in there.
Okay, back to 350 mode - LOL