The Milwaukee M12 12V Battery Charger (48-59-2401) is a lithium-based charger designed for 12V batteries. It features a 5-year manufacturer warranty and a compatibility with various Milwaukee M12 batteries and tools. The charger is Li-Ion based, making it a reliable and efficient option for charging your batteries. Additionally, it includes a California Prop 65 Warning due to its chemical composition. Made by MILWAUKEE TOOL, this charger is a trusted and high-quality option for keeping your batteries powered up.