What sort of price range are you looking at?
ive just started to upgrade from the nitecore sc4 to the new usm ones as i have to get a pry bar to get a 21700 cell out of the sc4! :person_facepalming:
NITECORE UMS4 4-Slot USB Fast Charger, for 18650 21700 Batteries onesd
They do a 2 slot version that might interest you, will do all chemistries and fits all length cells.