2-pack of premium Milwaukee 18 Volt batteries. Featuring high capacity, long run-time, 2.4 amp-hour batteries which power the entire line of Milwaukee 18 volt cordless system of tools (excludes models 1108, 3108, 5364, and 6516). Milwaukee only uses the highest quality cells for their battery packs, which provide ultimate performance and long life. The new 2-pack saves money when compared to purchasing battery packs individually. Exclusive to Milwaukee, these slide-on style battery packs can be loaded onto many of the tools either facing forward or to the back to provide ultimate balance and to fit into tighter areas. Be sure to recycle your batteries.