Various power supplies without mains supply

The invention discloses various power supplies without the mains supply. A micro induction generator and an ultra-high capacity capacitor are mounted in a shell of each power supply; when an electric appliance cannot work due to no electric energy, a self-powered power supply is shaken back and forth, at the moment, permanent magnetic steel in the micro induction generator can shuttle back and forth in a stator coil; in the process that the permanent magnetic steel shuttles back and forth, the permanent magnetic steel and the stator coil interact with each other to generate electric energy; the generated electric energy can charge the ultra-high capacity capacitor; after the ultra-high capacity capacitor is charged, the stored electric energy can supply power to the electric appliance.