Amazon.com: X-Adapter 1x Adapter Only for Craftsman V20 (NOT Old 20v) Cordless Tools Compatible with Milwaukee M18 RED Lithium Batteries- Adapter Only (US Stock), 18ML-V20 : Tools & Home Improvement
Adapter Converter Work with Milwaukee M18 18V Li-ion Battery for Milwaukee V18 48-11-1830 Battery;48-11-2200 48-11-2230 18V NI-CD Tool Battery Battery - Amazon.com
MILWAUKEE M18 18-Volt Lithium-Ion Cordless Combo Tool Kit (9-Tool) with (3) 4.0 Ah Batteries, Charger and Tool Bag - Amazon.com
Milwaukee M18 18-Volt 4.0 Ah Lithium-Ion XC Extended Capacity Battery Pack 48-11-1840 - The Home Depot
Voltage isn't Everything” – Milwaukee M18 High Output Cordless Power Tool Tech Surprised Us