UnshavenFish
Well-Known Member
Panasonic NCR18650B - anybody?
Good quality
Personally I didn't find any notable difference in runtime between the OEM and many others including the NCR B (regardless of mAh) in fact in my tests these two stayed within 0.1v of eachother most of the time and even as close as 0.05v both giving 6 sessions before unable to heat the bowl (Panasonic actually had a faster drop in the last session compared to the OEM) tests ran using a gravity bong to keep draws as comparable as I could in terms of size and length, also the OEM has a slightly faster upto temp time (although not anything you would notice unless timing it)
The main thing if using any aftermarket cell is to get it from somewhere you can trust that it is what it claims, like @chevyfried says there are lots of bad ones out there, I have quite a few that I have ordered from various auction sites over the years that are not even close to the claimed figures (to the point that IMO they could be dangerous to use in some applications and chargers)
Shop careful and stay safe