Dewalt Bauer Hercules 20V Battery to Craftsman V20 Tool Lithium 20 Volt Adapter | eBay
DEWALT 18 Volt to 20 Volt MAX Battery Adapter Combo Kit - Carr Hardware
20V MAX* XR® 10Ah Battery | DEWALT
Amazon Has This DeWalt 20V Max Battery and Charger for 49% off
Amazon.com: Enventor 20V 2.0Ah Lithium Ion Battery, 20V 2.0Ah Replacement Battery, with LED Power Indicator, Compatible 20Volt Cordless Power Tools : Health & Household
CRAFTSMAN V20 20-V 2-Pack Lithium-ion Battery (4 Ah) in the Power Tool Batteries & Chargers department at Lowes.com