EGO Power+ZT4204L 42-Inch 56-Volt Lithium-ion Cordless Z6 Zero Turn Riding Mower with (4) 10.0Ah Batteries and Charger Included. Peak Power+ Technology combines the power of up to 6 EGO 56V ARC Lithium batteries. Holds up to 6 batteries for maximum runtime (4 included). Power of gas with 22 HP equivalent engine. Cuts up to 2-Acres on a single charge with the included 4 56V 10.0Ah ARC Lithium batteries. World’s First Platform Compatible Rider – powered by all EGO 56V Arc LithiumTM batteries. 3-7 MPH Speed, up to 8 MPH in travel mode. Customize the ride with user interface for ultimate control. 3 driving modes: Control, Standard, Sport. 4 Independent brushless motors. Ultimate comfort with adjustable seat suspension.