Single V18 Lithium-Ion battery for use with all Milwaukee® 18V cordless tools (excludes Milwaukee Models 1108, 3108, 5364 and 6516). Weighs 24% less than 18V Ni-Cd batteries. Made with the highest quality cells, providing ultimate performance and long life. Charge with Lithium-Ion/Ni-Cd charger, Item# 332818 (sold separately).