Featuring a highly efficient 7.8/12.8 Ah rechargeable lithium battery, with a maximum range of up to 25/37 Miles. The gear motor is 20% more energy-efficient than gearless motors and excels in climbing, effortlessly tackling slopes of 8-10 degrees. The kit’s maximum speed is 15.5 mph, with a variation of 3 mph depending on the rider’s weight and terrain, ensuring both speed and safety during use.