Works great. This for the tool and battery adapter only, no actual battery is included. Battery adapter, DCA 1820, plugs (tightly) into the old 18V socket so you can use modern 20V lithium ion batteries.
The DeWalt DC390 18V Volt Cordless 6-1/2" Circular Saw Blade is a high-quality power tool designed for cutting wood. This circular saw features a 6 1/2" blade diameter, 18V Nickel-Cadmium battery technology, and a brushed motor type. The set includes the tool only, without batteries included. With a yellow color and suitable for wood, this DeWalt circular saw is a reliable and efficient tool for various home and workshop projects.