DeWALT DCA1820 Battery Adapter, 18 to 20 V Input, Battery Included: Yes, Includes: (1) 18 V to 20 V MAX Adapter

Allows for use of 20 V max compact batteries in most DeWALT® 18 V tools. Adapter will not fit into DeWALT® 18 V chargers. Requires use of DeWALT® 20 V max charger. Battery and charger sold separately.