Makita 12V max CXT Lithium-Ion Cordless 1/4 in. Sq. Drive Impact Wrench Kit, 2.0Ah with Bonus 12V max CXT 4.0Ah Battery WT04R1-BL1041B - The Home Depot
Makita BL1014 12V Max Lithium-Ion Battery , Black , pocket size - Cordless Tool Battery Packs - Amazon.com