Abstract: A mechanical energy storage system and method is provided, for storing a mechanical energy and generating electricity using the stored mechanical energy, which is small and can be used to charge portable digital devices such as smart phone, mobile phone, tablet PC, notebook, PMP, etc. An external mechanical force is used to compress high pressure gas charged in a pressure vessel, stored as a reacting force, a stored energy, due to proceeding of piston rod, which can be used as a power the devices whenever it is necessary, or so as to generate electricity by powering a gas generator.

Abstract: A mechanical energy storage system and method is provided, for storing a mechanical energy and generating electricity using the stored mechanical energy, which is small and can be used to charge portable digital devices such as smart phone, mobile phone, tablet PC, notebook, PMP, etc. An external mechanical force is used to compress high pressure gas charged in a pressure vessel, stored as a reacting force, a stored energy, due to proceeding of piston rod, which can be used as a power the devices whenever it is necessary, or so as to generate electricity by powering a gas generator.

Abstract: A portable generator comprises a fluid pressure generator, a fluid pressure cylinder, a gas power generator, a gas generator, and a charger. The fluid pressure generator is for generating a fluid pressure by pumping, and the fluid pressure generator includes an airbag for compensating a volume change by the pressurized moving of the non-compressible fluid. The fluid pressure cylinder is connected to the fluid pressure generator and comprising a fluid pressure piston, a gas piston, and a piston rod connecting the fluid pressure piston and the gas piston. The gas power generator comprises a high pressure gas chamber, the piston rod, the gas piston of the fluid pressure cylinder, and a cycle path. The gas generator is for generating electricity with a flow of the high pressure gas moving in the high pressure gas chamber as a power source.

Abstract: A portable generator comprises a fluid pressure generator, a fluid pressure cylinder, a gas power generator, a gas generator, and a charger. The fluid pressure generator is for generating a fluid pressure by pumping, and the fluid pressure generator includes an airbag for compensating a volume change by the pressurized moving of the non-compressible fluid. The fluid pressure cylinder is connected to the fluid pressure generator and comprising a fluid pressure piston, a gas piston, and a piston rod connecting the fluid pressure piston and the gas piston. The gas power generator comprises a high pressure gas chamber, the piston rod, the gas piston of the fluid pressure cylinder, and a cycle path. The gas generator is for generating electricity with a flow of the high pressure gas moving in the high pressure gas chamber as a power source.