Product Features 7.5 Ah 56-Volt Lithium-Ion Battery: Industrys most powerful battery 40% More Power: Compared to the leading 40V Battery Patent Pending Keep Cool Technology: Keeps each battery cell cool for extended life Patent Pending Power Management System: Protects the battery from harsh elements Fast Charge Time: Charges in 60 minutes with the Super fast charger 145-Minute charge time with Standard charger Compatible with all EGO Power+ Power Equipment Keep Cool Technology