Works with high-power Li-ion battery (not included). LED lights indicate when battery is fully charged. Auto-stop when battery is fully charged. Light weight and easy to use. Choose from available volt options. The down time with a lithium-ion battery isn't going to be common, but every once in a while, those hard-working batteries need a visit to the GreenWorks Battery Charger. Easy-to-read indicator lights let you know when your battery is ready to go again. Charging stops automatically when the battery is ready, and you've got a full range of voltage options available, so get ready for those big jobs and find the charger that's right for your tools. About GreenWorksAll GreenWorks products have a carbon footprint of ZERO. That means that absolutely no emissions are ever released, and you'll never have to inhale gas fumes while mowing your yard or trimming your hedges. Plus, it means higher efficiency, so you'll get more out of your lawn tools each time you use them. Each product is EnergyStar-approved by the Environmental Protection Agency, which means that energy usage is reduced by about 35 percent. For GreenWorks, Green is more than just a name - it's a commitment.