Ryobi has a new-ish line of Tek4 single-cell tools. They sell a single battery 4hr charger that costs $13, or a two-battery 36min charger that costs <$30 I think.
Obviously the cradles do not fit 18650’s, so they’d need cradles harvested from DX chargers or whatever.
Also the time will be higher to charge high-capacity 18650’s if they are intended to charge 1000-1500mAh safe chemistries.
They may not be appropriate at all for standard Li-Ion 18650’s if they are actually intended for A123 “nano” 18650’s, which have a lower voltage range overall.
I may pick up one cell (they are sold individually) and open it to see what it is. People on RCG / CPF do not seem to know (or care?) what’s in the cells. $13/ea isn’t a bad price for individual safe chemistry 18650’s.
Yeah, I’ll probably do that. Maybe I can do it gently, in case I want to return the cell to the store!