The cordless screwdriver (figure A) is one of the most useful cordless tools. The cordless rotary tool (figure B) has a variety of bits that can be used for sanding, grinding, etching, cutting or engraving. Some cordless tools offer an interchangeable battery system. This allows you to charge just the batteries, then swap them out when they lose their charge. One of the most popular tools these days is the cordless drill (figure C), which is great in areas where outlets aren't available. Some folks like to use them instead of a corded drill because they don't have to step around a cord all the time. The larger the battery on a cordless drill, the longer it will keep its charge. Larger batteries are also heavier. The cordless nail gun (figure D) can be a real time-saver. The gun uses both a battery and a fuel cell (figure E) filled with propane or another combustible material. With an 18-volt cordless circular saw (figure F), you won't need to worry about cutting through the cord.
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