Greenworks 2 x 24V (48V) 21-Inch Brushless Self-Propelled Mower, with (2) 5Ah USB Batteries and Dual Port Charger. The Greenworks 24V POWERALL™ lithium-ion platform powers over 50 indoor & outdoor products, including lawn mowers, blowers, string trimmers, chainsaws, power tools and more! Our 24V lithium-ion battery provides 20% more power and 35% more run-time, and delivers fade-free power with no memory loss after charging.