does it hurt to leave batteries on charger after charged

No- lithium ion does not build a memory or get hot.

Will it charge a 20 lithium 4 AH battery?

Yes, this replacement dewalt charger, can charge the dewalt 20v lithium battery. If you battery is dewalt 20v battery, that means our dewalt charger can charge it. If you need more helps, please contact us for customer support via your Order ID, Or contact us Service01@energup.cn. We are glad to service for you. Kind regards Energup Service Team

Will it charge flex volt batteries?

Sorry, we don't clear your meaing. The charger can charge the dewalt 12v lithium batterym, dewalt 20v lithium battery. Could you tell us more details about your questions? So that, we could better serve for you. Please feel free to contact us through your Order ID, Or contact us Service01@energup.cn. Best wishes Energup Service Team

Energup DCB102 Charger for Dewalt 20v Battery Charger Compatible with Dewalt 20v Max DCB200 DCB203 DCB125 DCB107, Charging Station for 12-20V dewalt Battery Charger (2-Port Simultaneous)

Details

Description

Common Questions