Works great and adds versatility to choose 18650 or 18350. KR4 and KR1 tubes have slightly different shapes but seem cross-compatible.
A
Anonymous · September 16, 2025
Must have addition
I am really enjoying my KR4 and although I do like the standard 18650 size the 18350 tube is a must have in my opinion. If you use the better quality 18350 batteries the quad set up of the KR4 becomes a palm sized reliable powerhouse. For the price the 18350 tube should be considered a must have buy for anyone considering the KR4.
N
Noel · August 22, 2025
Fits great and color matches pretty nicely, the inly thing i wasnt aware of is that the clip or lanyard ring dont allow the light to work when out on, put i dont mind as i usually dont use either when using the 18350 tubes.