48V - Zero 8 and Zero 9 = 54.6V charger
52V - Zero 10, Zero 8X, Zero 10X 52V = 58.8V Charger
60V - Zero 10X 60V = 67.2V Charger
72V - Zero 11X = 84V Charger
Normal chargers will only charge at 1.5 or 2 amps.
Fast charger will give out 5 amps which is effectively having 2 chargers in at the same time.
72V smart charger 10 amps*
*CAUTION: check to see if your battery management system is capable of charging at these high rates as not all batteries are able to do it.