The EGO Power+ 56-Volt 7.5Ah battery with upgraded fuel gauge uses industry-leading ARC-Lithium technology to deliver Power Beyond Belief and is compatible with all EGO outdoor power equipment. Keep-Cool battery technology keeps each cell cool for long life and to work in the most extreme conditions. ARC Lithium™ battery is compatible with all EGO Power+ Equipment and chargers Specifications: Voltage: 56V, 420 Wh Amp Hours: 7.5 Ah Optimum charging temperature: 0°C-40°C Battery weight: 2.9kg Power Management System: Protects the battery from harsh elements Upgraded integrated Fuel Gauge: Shows how much power is left in the battery *Charger Not Included