Key Features:High quality, long lasting integrated frame mounting lithium-ion battery pack for Shimano STEPS systems,In normal mode the riding distance could exceed 100 km,Waterproof design as well as impact and vibration resistant,1000 charge cycles without significant power loss,Approximately five hours charge time,Charge level display with error signal info and on/off switch,Charging port,Lock system for off bike security,High 500Wh capacity (36V, 14Ah),Average weight 2650g.