The Westinghouse 40VMAX ® Lithium-Ion Battery offers a convenient emissions-free alternative to gas-powered tools. Interchangeable between Westinghouse 40VMAX ® Cordless Lawn & Garden Tools, this durable battery pack harnesses lithium-ion energy that gets through trimming, edging, and cutting in a snap. Powered by Samsung SDI™, these premium battery cells provide higher capacity power storage in fewer cells to let you get more work done in a day. More than 30% lighter while holding 300% more power per cell than traditional nickel-cadmium batteries, the battery boasts shorter charge times and longer battery life to keep your lawn looking precise at a moment’s notice. With the option of a 2.0 Ah, 2.5 Ah, or 4.0 Ah pack, Westinghouse 40VMAX ® Lithium-Ion Batteries do not require maintenance and will stay charged on the shelf to ensure you’re always ready to go.