Patent ID: 8716975

Claim:
A portable charging device, comprising: a case; a power generation module received in the case, and configured for generating an induced current; a storage module electrically connected with the power generation module, and configured for storing the induced current generated by the power generation module; and a plurality of different types of charging connectors connected with the storage module and protruding from the case for electrically connecting to different types of electronic devices and charging the electronic devices; wherein the power generation module comprises an outer barrel, a coil, a magnet, and two springs; the outer barrel comprises an upper surface, a lower surface, and an inner surface; the coil is circled and attached on the inner surface; the magnet comprises a first end surface and a second end surface; one spring is connected between the upper surface and the first end surface, and another spring is connected between the lower surface and the second end surface; the magnet is suspended in the outer barrel.