Motor Issue: Remove the battery, disassemble the left and right covers, disconnect the motor wiring harness, loosen the screws fixing the motor at the bottom, and then replace the motor. Controller Fault: Remove the battery, disassemble the left and right covers, disconnect the controller wiring harness, loosen the screws fixing the controller, and then replace the controller.

Battery Fault: Possible internal component failure or damage due to prolonged discharge. Charger Malfunction: Internal component damage, rendering the charger non-functional.

If the vehicle has a brake power cut function, it could be a damaged brake power cut line, which needs replacement. If the brake power cut line is intact, then it's likely a controller fault, requiring replacement.

The speed is adjustable in 3 modes. Use the speed adjustment knob on the base of the car to switch to low-speed mode.

Adjust the brake cable core's locking screw on the rear brake. Loosening the cable core will relax the brakes.

After riding, if the vehicle has a lot of mud, wash it first, then dry it, and finally apply appropriate lubricant evenly to protect the chain.

First, connect the battery to the charger to see if it charges normally. If it does, the battery is fine. Possible causes of the malfunction could be: throttle handle fault, controller fault, motor fault, or poor wiring.

When not in use, turn off the power and store the vehicle indoors or in a dry, ventilated place, away from direct sunlight or rain. Charge the battery regularly to maintain it and avoid prolonged overcharging. Before riding, check if the brakes and electrical components are functioning normally, and ensure no damage to the circuitry. After riding, clean mud and water stains from the vehicle and keep it dry.

Regular and timely charging is necessary to prevent battery damage due to prolonged discharge.