Circular saws have a round blade that rotates around an arbor to make straight cross, rip, and beveled cuts in wood or metal stock when exact precision is required, such as in framing. Cordless circular saws are battery-operated so they can be used where access to an electrical power source is not available. They're also more portable than corded saws and easier to move around a work site. Corded circular saws require access to a wired electrical source to operate and have more power and longer run times than cordless saws.