Dewalt FLEXVOLT Replacement Battery Pack from Poles, Inc.
DeWalt 18V NiCad Rechargeable Battery Rebuild Kit
Compatible DeWALT DCD795D2BT Battery Replacement - For DeWALT 20V MAX* Power Tool Battery (1500mAh, Lithium-Ion) - Walmart.com
Amazon.com: Fancy Buying Replacement Battery Adapter DCA1820 for Dewalt 18V Tools, Convert 18V / 20V Lithium Battery to NiCad/NiMH Battery, Makes The Battery can be Used for Nickel Drill and Charger :
DEWALT FLEXVOLT 20V/60V MAX Lithium-Ion 12.0Ah Battery DCB612 - The Home Depot
Dewalt 20v Battery Max Powerstac Compact Battery 1.7ah Dcbp034 Replacement Li-ion Battery For Dewalt Max Xr Power Tool Batteries - Battery Pack - AliExpress