Greenworks 20322. Features: Brushless Motor delivers up to 30% more torque for superior cutting performance. High performance 40V G-Max Lithium-Ion battery delivers fade-free power with no memory loss after charging. Robust 16 in. steel chain and bar with tool-less chain tensioning offers ease of use while delivering the highest cutting performance. 3/8 in. chain pitch delivers the right amount of capabilities to get those limbs trimmed and cut with minimal kickback. Rear handle design provides excellent control . especially during overhead use. Over-molded handle for increased user comfort. Powerful enough to cut up to a cord of wood on a single charge. Note: 40V G-MAX and 40V Lithium-Ion Batteries are not cross compatible.