52v 4 amp Lithium Ion Battery Charger - DC 2.5mm x 5.5mm
52v Fast Charging 4-AMP!! Lithium Ion Battery Charger / 90~264VAC Universal AC input / Charge voltage 58.8 / AC Plug: USA / DC Charge connector: DC 5.5x2.5mm / Power: 4 amps / Protection function: / Overload / Over voltage / Over temperature / Over current / Reverse polarity / Power off or trickle after finished charging.
This high current 4 amp charger will charge the 52v Shark battery in 2-3 hours. Less than 4 hours if the battery is totally drained.