PSA you can jumpstart dead m12 and m18 batteries : r/MilwaukeeTool
Amazon.com: Janllenton 18V 15-Cells 18650 Battery DIY Replacement Case for Milwaukee M18 48-11-1890, Plastic Battery case Replacement Repair Kit for Milwaukee M18 9.0Ah (Battery not Included) : Tools & Home Improvement
Milwaukee M18 18-Volt Lithium-Ion 1/2 in. to 4 in. Force Logic High Capacity Cordless Knockout Tool Kit w/Die Set & Conduit Bender 2676-23-48-22-4080 - The Home Depot