GreenWorks 29732 4.0-Amp Hour Lithium Ion Battery, GreenWorks Enhanced 24-Volt Lithium-Ion Battery GreenWorks Enhanced 24V Lithium-Ion Battery now provides higher efficiency and greater performance Quick charge time of 120 minutes vs. 180 minutes Light weight design of 2.05 lbs. Compatible Only with GreenWorks Enhanced 24V Series Products Maintains consistent fade free power throughout entire run time