Battery Adapter for Dewalt 14.4V/18V/20V Lithium Ion Battery,DC Port & LED Work Light &Dual USB Charger,Power Source,Power Supply Compatible with Dewalt DCB090 DCB091 - Walmart.com
Upgrade Dewalt 14.4v Drill to Use 18v Battery : 3 Steps - Instructables
How to Rebuild a Dewalt 14.4v Battery Pack : 9 Steps (with Pictures) - Instructables
Synergy Digital Power Tool Battery, Compatible with DeWalt DC930 Power Tool, (Li-ion, 14.4V, 3000mAh) Ultra High Capacity, Replacement for DeWalt DC9144 Battery