GreenWorks 29302 Gen1 40V 2 AH Lithium Ion Battery 40-volt, 2 amp hour lithium ion battery can be used with all 40-volt greenworks tools Quick charge in 75 minutes Lightweight GreenWorks Gen1 40V Lithium-Ion battery performs at maximum power for the best lawn care results with innovative fade free power 2 AH offers light weight design for user comfort when working out in the lawn Complete your yard work with this 40V system, compatible with 10 different lawn tools Compatible only with GreenWorks Gen1 40V Tools and Charger Model 29292 Not compatible with GreenWorks GMAX tools and charger. Only compatible with GreenWorks G-MAX 40V Li-ion Battery Models 29462, 29472, and Charger 29482".