Amazon.com: TPDL Battery Adapter for Milwaukee 18V M18 to 12V M12 Tool Use, for Milwaukee 18V Battery Convert to 12V Tools Adapter- ML18M12 Adaptor ( Adapter Only) : Electronics
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Battery Adapter for Milwaukee 18v Battery, USB Power Source & TSV Power Charger Adapter with LED Work Light - Power Source Supply (Tool Only) - Walmart.com
Milwaukee M18 18-Volt Lithium-Ion Cordless Power Source (Tool-Only) 49-24-2371 - The Home Depot