GreenWorks 29282 Gen1 40V 4 AH Lithium-Ion Battery 40V 4 AH Lithium-ion battery for mowers, trimmers, leaf blowers, hedgers, and more Interchangeable design--works with Greenworks' entire 40V tool line Easily snaps in and out of each tool for quick and efficient recharging LED indicator light; recyclable and Energy Star rated; charger not included Measures 7.1 by 3.6 by 3.6 inches; 2-year warranty GreenWorks Gen1 40V Lithium-Ion battery performs at maximum power for the best lawn care results with innovative fade free power 4 AH offers longer run time for all GreenWorks 40V Tools Complete your yard work with this 40V system, compatible with 10 different lawn tools Quick charge time of 180 minutes Compatible only with GreenWorks Gen1 40V Tools and Charger Model 29292