No ITEMS STANDARD REQUIREMENT1 1Charging Voltage5V DC1 2Charging current3A max1 3Charging time3h1 4Battery type186501 5Battery capacity2000mAh 2pcs in a pack1 6Rated voltage of battery pack7 40V1 7Battery life85 Original capacity ≤ 300 cycles1 8Motor typeBLDC D28 81 9Operating Voltage of motorDC 6 9 VThe voltage constant betweenmotor lead wire