Abstract: This invention proposes to use the typing force to generate electricity. Electromagnetic devices are placed under the keys of a keyboard. When a key is pressed, the electromagnetic devices are driven so that the magnets and the coils or the coils and cores have relative movement to generate the electricity. When the key is released, the force stored in the spring or between the magnets and the cores or both drives the key, the magnets, and the coils or the cores and coils back to their positions so that the magnets and the coils or the coils and cores have relative movement to generate the electricity. Any number of keys may share any number of electromagnetic devices. For the wireless keyboard, with the generation of the electrical currents when the typing keys are operated with pressing down or raising up movements, the batteries are no longer required and can be eliminated.