Today only, save up to 30% on the 16-, 19-, or 20-inch 40-volt lithium-ion-powered G-MAX lawn mowers from GreenWorks. The lawn mowers include a 40-volt lithium-ion battery compatible with all GreenWorks G-MAX outdoor power tools. With up to 70 minutes of runtime, G-MAX lawn mowers are a great alternative to gas-powered mowers.