Several factors affect the life of a battery-powered chainsaw, including how often you use it and how often you charge it. Chainsaws typically last from two to five years if they are used daily. It is expected that you will get between five and seven years out of your chainsaw if you only use it once or twice a month. What's the best battery powered battery-powered BLACK+DECKER Cordless 20V Chainsaw is the best battery-powered chainsaw on the market. It has a 10-inch bar and is light enough to be maneuverable. Thanks to this product, you'll be able to accomplish more with less hassle than ever before.