The innovative GMAX 40V lithium-ion battery delivers high performance & efficiency among all green works GMAX tools. A quick charge time of 120 Min for a 2 ah battery makes the new green works GMAX series of lawn tools a great option when looking to replace gas powered products. Featuring a simple snap on & off design for ease of use & innovative battery charge level indicator with one USB charging port. Lithium-ion batteries offer no negative memory effect, consistent fade free power throughout its entire run cycle & 3 times longer run time than NiCad batteries. From mowing & edging, to trimming & blowing, you can now Complete your yd work with one battery platform that will provide you with the power & performance you need to get the job done quickly & efficiently. Become more efficient when working in your yd by purchasing the green works GMAX 40V lithium-ion series of lawn tools. This interchangeable battery platform offers all the tools you need to Complete your yd work without sacrificing performance or power.(Not compatible with previous green works 40V tools)lithium-ion batteries can be charged any time with no negative memory effect, so they will be at peak power even after hundreds of charge cycles. Even a few Min of charging gives you enough full power to finish the job.