16 - 18 volt batteries, most now come with lithium battieries which
are lighter and have more lasting power, other drills are corded
DETAIL:
The circular saw is a metal disc or blade sometimes with saw teeth on the edge as well as the machine that causes the disk to spin. It is a tool for cutting wood or other materials and may be hand-held or table-mounted. It can also be used to make narrow slots . Most of these saws are designed with a blade to cut wood but may also be equipped with a blade designed to cut masonry, plastic, or metal.