With 40V of Worx Nitro power, the chain on the WG385 spins at 59 feet per second, comparable to traditional gas-powered chain saws. This model also features a brushless motor that provides a longer runtime, higher efficiency and increased power. Don't let the lack of fuel and cords fool you - the dual batteries provide plenty of cordless power to tackle firewood cutting, bucking and any other common tree maintenance jobs on your property or jobsite.