The Dewalt DCM 565 is a 18v cordless chainsaw that has a brushless motor, it also has an automatic lubricator- like most chainsaws. This chainsaw is really easy to use and is safe and very quiet, when compared to a petrol chainsaw. Cutting logs or branches is a piece of cake with the DCM 565. In the video I show how many logs it can cut from a single 5AH battery charge. If you are going to be using this chainsaw for prolonged periods of time, you will need several batteries!