Perfect for yards up to 1/2 acre . Greenworks 40V tools are lightweight . start instantly . and require virtually no maintenance – no gas . no oil . no mess – but still deliver gas-like power. The innovative 40V Lithium-Ion Battery delivers high performance and efficiency among all Greenworks tools. Featuring a simple snap on and off design for ease of use and innovative battery charge level indicator with charging port. Lithium-ion batteries offer no negative memory effect . consistent fade free power throughout its entire run cycle and 3 times longer run time than NiCad batteries. From mowing and edging . to trimming and blowing . you can now complete your yard work with one battery platform that will provide you with the power and performance you need to get the job done quickly and efficiently. Become more efficient when working in your yard by purchasing the Greenworks 40V Lithium-Ion Series of lawn tools. This interchangeable battery platform offers all the tools you need to complete your yard work without sacrificing performance or power. 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 minutes of charging gives you enough full power to finish the job.