12 volt Dewalt DW945K-2 battery by Powewarehouse - Professional Grade battery pack - Newegg.com
eReplacements 14.4-Volt NiMH Battery Compatible for Dewalt Power Tools DE9038-ER - The Home Depot
Synergy Digital Power Tool Battery, Compatible with DeWalt DW941K Power Tool, (Ni-MH, 14.4V, 1500mAh) Ultra High Capacity, Replacement for DeWalt DC9091 Battery - Walmart.com