dc motor 1.low electric current, 2.high-torque, 3.increased climbing power has great 4.green product. dc ... -grade and increase security.2, climbing: the same current, low-end torque climbing to double3 Mileage: low-grade traffic, extending continues the ... of 20-30 km..4, Battery life: small current high-torque, the effective mitigation of the impact of current on the ...