Greenworks 48-volt 21-in Cordless Self-propelled Lawn Mower 4 Ah (4-Batteries and Charger Included)

Two Greenworks 24 VOLT POWERALL™ batteries combine for 48 Volts of exceptional, better than gas power without leaving the 24 Volt battery platform

Up to 70 minutes runtime with (4) fully charged 4Ah USB batteries; runtime varies based on grass condition and operator technique; requires (2) batteries to operate

4-Port battery system is powered by (2) 24 Volt batteries; when first set of batteries are depleted, it automatically switches over to the second set of batteries for 2X the runtime