I can find loads of 18650 to 18350 tubes, But nothing in the other direction. Stupidly bought a 18350 unit……GRRRR
Uk if possible….
You could try contacting Simon through his store and see if he has an extra tube. Or find someone who has a 18650 tube and wants to trade. You could just but a second light or a host kit.
+1
Contact Simon. I’m sure he’ll help you out.
never thought of the need for this, I do not think it exists actually..
Plenty of tubes to make a 18650 s2 take a 18350……
I have NO 18350 cells. I’ll ask Simon, and if not i’ll just order a 18650 host, and make a lovely convoy battery holder out of the one i have……
If your 18350 is titaniumgrey or black I am sure you will find someone who is willing to trade! the short 18350 tubes I could find are red or blue only. so I am sure there is demand for grey or black.
Its is indeed a Ti Grey !!!
Cheers
Hi lumensearch,
Edit as we wrote replies at the same time!
As one Newbie from the U.K. to another, I may have a solution to your problem.
Please PM me.
Cheers,
S-L 
FYI - Simon is going to make 18350 tubes in the new green color as well as black for the S2+. No production date yet but probably just after the holidays.
why not buy a 18350 battery and have the choice of smaller or larger light (and runtimes)?