EBC Universal Smart Charger - 72v 4 amp Lithium Ion Battery
72V 4A Smart Charger / Selectable charge voltage to prolong battery life - selectable 80%, 90%, 100% charge voltage /90~264VAC Universal AC input / Charge voltage 84 / AC Plug: USA / DC Charge connector: XT60/ Power: 4 amps / Protection function: / Overload / Over voltage / Over temperature / Over current / Reverse polarity / Power off or trickle after finished charging.
This 4 amp fast charger will charge a 72v 12AH battery in 2-3 hours. Less than 4 hours if the battery is totally drained.
For more info on extending battery life click here.