Hand generator, portable power supply, can not charge the balance car. Because the charger of the balance car needs specific voltage and current, it does not match the portable power supply of the hand-cranked generator, so the portable power supply of the hand-cranked generator cannot charge the balance car. Hand-cranked generator portable power supply is a kind of power supply that relies on people to turn the generator by hand to generate electricity and store it through the built-in energy storage battery.