This Cordless Chainsaw by DeWalt has been manufactured with a Brushless Motor for increased run-time and power making it ideal for everyday use on the job site. The DCM565 features a lightweight and compact build design, suitable for one-handed cuts with a 7.68 m/s chain speed allowing tasks to be completed in a safe and controlled manner. Because the speed is just under 8 metres per second you don't need a certificate to buy this machine. Features Powered by 18V XR 5.0Ah Li-ion battery for extended run time (70 cuts 4" x 4" pressure treated spruce) Lightweight and compact (3.6kg), ideal for one-handed cuts 30cm Oregon bar cuts almost twice its length (that's a half meter diameter log) 7.68 m/s chain speed allows completion of tasks in a controlled manner Chain brake stops in less.