DEWALT DCB118 20V MAX FLEXVOLT Fast Charger FLEXVOLT - The Power of Corded. The Freedom of Cordless Internal fan that pulls air across the battery to cool and reduce hot/cold pack delays The fan assisted cooling results in faster charge times and reduced downtime Charges a DCB606 FLEXVOLT battery in 60 minutes Compatible with all 20V MAX* and 60V MAX* DEWALT batteries