Chainsaw 24V 4.0 Ah 12 In. brushless Chainsaw w/ Battery & Charger has Intelligent Brushless Motor Technology. 2x more torque, provides more power, longer runtimes, quiet operation and extended motor life. Auto-oiler mechanism ensures the chain stays lubricated, and the oil level indicator window allows you to gauge oil usage. Greenworks 24V Lithium-Ion battery provides 20% more power and 35% more run-time, and delivers fade-free power with no memory loss after charging. Compatible with Greenworks 24V Li-Ion system for fade-free power with no memory loss after charging and an assortment of tools to complete all your indoor and outdoor projects.