WC-72 : Wall charger for FNB-72 and FNB-85 series battery packs. Plugs into 110-120VAC wall outlet, other end plugs directly onto the connector of your FNB-85 or FNB-72 type battery. Charges battery at 200mA/hour. Charging time varies with battery capacity. Monitor battery while charging, and UNPLUG after estimated full-charging time.