Amazon.com: Upgraded DCB104 Replacement for Dewalt Battery Charger, Simultaneous Charging for 12V and 20V Max Battery with 2 USB Ports, Compatible with DCB124 DCB126 DCB200 DCB205 DCB206 DCB606 DCB609 : Tools &
DEWALT 18V–20V MAX Battery Adapter Kit — With (2) 20V MAX Batteries & Charger, Model# DCA2203C | Northern Tool
DEWALT 12V MAX 20V MAX Lithium-Ion Battery Charger
DEWALT 20V MAX Compact Lithium-Ion 3.0Ah Battery Pack with 12V to 20V MAX Charger DCB230C - The Home Depot
I modified a DeWalt battery charger to have the battery act as a power supply for a 12V car charger so I can charge my phone and radio on my work cart.