A hand-held portable drop-light is provided. Both of a writing operation and an erasing operation are performed by one gate driver that is mainly constituted by a shift register for selecting a row and a control circuit for switching between a writing operation and an erasing operation. When the motor suddenly stops, a heavy load lifted by a tight wire rope reel provides a reverse pulling force so that the wedge shape piece B produces a reverse thrust force to push the friction faces of the braking plates, so the braking effect is achieved quickly.