An electromagnetic generator comprising an antenna that receives radiofrequency energy. The antenna is connected to a rectifier circuit, which is used to charge a first battery using the radiofrequency energy received by the antenna. The first battery supplies power to a control unit, which powers at least one electromagnet to generate a magnetic field. A flywheel having at least one magnet is configured to rotate when the magnetic field is generated. An alternator, connected to the flywheel, charges a second battery based on the rotation of the flywheel. The second battery is then used to supply power to an external device.