Remember when you could keep your batteries fully charged? Power your life with the WEN 40V Max Lithium-Ion Quick Charger. Take your WEN 40V batteries from 0 to 100% in approximately one hour. This charger is compatible with the WEN 40V Max Series, including the WEN 40401 40V Max 2Ah Lithium Ion Battery and the WEN 40404 40V Max 4Ah Lithium Ion Battery. Just slide the battery into place and let it charge. Indicator lights help users know once their battery is done charging. Really not a whole lot else to say. It has a two-prong plug and a 2-amp output. It charges WEN 40V Max batteries. Do you need to know anything else about this charger? Power your life with the WEN 40V Max Lithium-Ion Quick Charger. Remember when you could charge your batteries quickly and efficiently? Remember WEN.