EBC Universal Smart Charger - 48v 4 amp Lithium Ion Battery
48V 4A Smart Charger / Selectable charge voltage to prolong battery life - selectable 80%, 90%, 100% charge voltage /90~264VAC Universal AC input / Charge voltage 554.6 / 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 the 48v 14AH Shark battery in 2-3 hours. Less than 4 hours if the battery is totally drained.
For more info on extending battery life click here.