DEWALT, 20V MAX 1/2in. Compact Impact Wrench (Tool Only), Drive Size 1/2 in, Volts 20, Battery Type Lithium-ion, Model# DCF911B | Northern Tool
DEWALT POWERSTACK 20-Volt 2-Pack 1.7 Amp-Hour; 1.7 Amp-Hour Lithium-ion Power Tool Battery in the Power Tool Batteries & Chargers department at Lowes.com