Best in what way? I use Vapcel 1000mAh (purple) in all my 18350 lights but the largest available capacity is what I base my choice on, there may be a higher current option if you want more output at the cost of runtime.
Flat top is best. I used a button top at first and had to stretch the springs to use a flat top afterwords. Only showed the problem in turbo, manifested as a slight flicker.
Has anyone found a deep carry clip that will work yet? I really think that is all this light needs to be perfect, had the same complaint about my Zebralight.
ok, thanks, sorry for the questions, just too many pages to read through. I have a ton of button top protected cells, but 0 unprotected flats, will 3000mah Samsung INR18650-30Q fit/contact + end in opus charger without a spacer?