Abstract: The present invention discloses a low voltage protection device for batteries, comprising a load, being a motor for employing as a power source of a vehicle; a secondary battery, having a rechargeable feature and providing power to said load; a low voltage protection circuit, capable of turning on/off the circuit between said load and said secondary battery; a low voltage detection circuit, for outputting a current for switching said low voltage protection circuit to an off state when the voltage of said secondary battery being detected is lower than a predetermined voltage; and a non-retaining start button, for driving said low voltage protection circuit to activate said connect said low voltage protection circuit while pressing the same to connect said load with said secondary battery.