This 16.8V 3A universal Lithium battery smart charger comes with alligator clip output leads for 4S cell lithium battery pack. The lithium ion charger DC 16.8V is built to be highly safe and reliable that features reverse polarity protection and spark proof to ensure safe use. The universal battery charger DC 16.8V 3A is certified to UL1310, TUV/CE 60335-2-29 and RCM/AS/NZS60335-2-29. It is a smart lithium ion battery charger that provides precision charging control and status monitoring.