This 40V lithium-ion battery can be used across the wide majority of Greenworks garden products. Delivering fade-free power that suffers no memory loss from charging, they offer a cleaner more sustainable alternative to other fuel types. A full charge can be achieved in just 120 minutes with an 80% charge available in just 70 minutes. The interchangeable quality of Greenworks batteries allows you to have a constant source of power with multiple batteries used across multiple products. Each battery has a built-in LED indicator to clearly show charge level.