DEWALT 18-Volt to 20-Volt MAX Lithium-Ion Battery Adapter Kit with 20-Volt MAX XR Premium Li-Ion 5.0Ah Battery Pack (2-Pack) DCA2203CWDCB205 - The Home Depot
DEWALT 20-Volt Max 4-Pack 2 Amp-Hour; 4 Amp-Hour Lithium Power Tool Battery in the Power Tool Batteries & Chargers department at Lowes.com
DEWALT 20-Volt Max 2 Amp-Hour Lithium Power Tool Battery in the Power Tool Batteries & Chargers department at Lowes.com
DEWALT 20V MAX Lithium-Ion Brushless Cordless String Trimmer Kit with Bonus 0.080 in. x 225 ft. Replacement Line Included DCST922P1WDT802 - The Home Depot
How I rebuilt some DeWalt batteries for a quarter of the cost of replacing them : r/DIY