Milwaukee M12 and M18 12-Volt/18-Volt Lithium-Ion Multi-Voltage Battery Charger 48-59-1812 - The Home Depot
DIY Charge any cordless tool/drill battery without a charger using Turnigy balance charger - YouTube
Amazon.com: Lithium Battery Fast Charger for Milwaukee M12 M18, 18V 110-240V Rapid Charger with Multi Level Protection, Easy to Use (US Plug) : Tools & Home Improvement
Amazon.com: Compatible with Milwaukee 48-59-1810 Vehicle/Car Charger for M12 /12V 18V/M18 Battery Charger for 48-11-2401, 48-11-2402, C12 B, C12 BX, M12, M14,M18, M18B, M18B4, M18BX : Automotive
Charging A Drill Battery Without An "Official" Charger - YouTube
Quick tip: Make a Cable for cordless tool batteries without using metal clips - YouTube