EVVA or KeepPower: which 26650 choose?

I mean even if you took the springs out, it doesn’t fit because of the inner metal parts interfere at both ends. It’s not the width that’s the issue.

Thank you so much for all this valuable information!
I am more and more pleased to attend this forum.
Just please forgive my bad English….

I have two extensions and currently have three protected, 3400 Panasonics in it.

Are you sure three 5200s wouldn’t fit?

The Panas are a bit shorter but also thinner, so they don’t get interference from the silver ring in the tail cap for example.