6.0 Ah 56 Volt Lithium Ion Battery Industrys most powerful battery40% More Power Compared to the leading 40V BatteryPatent Pending Keep Cool Technology Keeps each battery cell cool for extended lifePatent Pending Power Management System Protects the battery from harsh elementsIntegrated Fuel Gauge Shows how much power is left in the batteryFast Charge Time Charges in 45 minutes with the Super fast charger115 Minute charge time with Standard charger