MOW POWER! Cutting-edge grass-grooming tech meets the 24V iON+ Series with the 48-Volt Cordless Lawn Mower from SUN JOE. Powered by the exclusive iON+ lithium-ion battery system, Sun Joe includes two 24-Volt, 4.0 Ah lithium-ion batteries for no-fade power + performance, and up to 25 minutes of rechargeable runtime with zero carbon emissions for cleaner air. And the dual-port charger quickly powers up two batteries at once