The Dewalt XR 4.0Ah Lithium-ion cordless range, which offers eXtreme run time, increased efficiency and improved performance. By constantly monitoring tool and battery operation, the intelligent switch module maximizes performance and prevents damage caused by overload or temperature build-up. This technology, combined with a tough outer casing and superb ergonomics means that XR Lithium-ion is truly "Tough on the outside & Intelligent on the inside".The DeWalt DCS391M2 is an 18 volt XR Li-Ion premium Circular Saw featuring XR 4.0Ah Li-Ion battery technology. It is part of the intelligent XR Lithium Ion Series, designed for efficiency and for making applications faster. The saw has a powerful and highly efficeint PM58 DEWALT fan cooled motor with replaceable brushes, which delivers up to 3,700 rotations per minute for a fast cutting action. It has an extremely durable tool design, including a cast magnesium base, which allows repetitive, accurate cuts. In addition, the intelligent trigger allows total control over all applications. With an ergonomic handle set with rubber overmold, the saw provides optimum comfort to the user.Features & Benefits:• Latest generation 18V XR Li-Ion premium Circular Saw featuring NEW XR 4.0Ah Li-Ion battery technology• Part of the intelligent XR Lithium Ion Series designed for efficiency and making applications faster• PM58 fan cooled motor with replaceable brushes delivers up to 3700 rpm for fast cutting action• Ergonomic handle set with rubber overmold to optimise end user comfort• Extremely durable tool design, including a cast magnesium base for repeatitive, accurate cuts• Intelligent trigger allowing total control over all applications• Keyless bevel angle and depth of cut adjustment with easy to read scale • Spindle lock for quick and easy blade change• Lock off switch and electronic motor brake for additional control and work safety• Ultra thin kerf 165 mm, 24 tooth carbide-tipped blade allows for maximum 55 mm depth of cut• Improved ergonomic design and rubber grip increase comfort• Multi-voltage Charger for use with 18V, 14.4V and 10.8V XR Li-Ion slide pack batteriesSpecifications:• Voltage - 18 V• Battery Capacity - Li-Ion 4.0 Ah• Blade Diameter - 165 x 20 mm• Power Output - 460 Watts• No Load Speed - 3700 rpm• Bevel Capacity - 50 °• Max. Depth of Cut at 90º - 55 mm• Max. Depth of Cut at 45º - 42.1 mm• Weight - 3.8 kgIncludes:• 165 mm carbide blade• Hex Key• Dust Port• Multi-voltage charger• 2 slide batteries• Heavy duty kit box