An electric energy supplying device includes a set-up circuit coupled to an electric energy source, a limited current circuit and a voltage regulator coupled to the set-up circuit, a battery coupled to the set-up circuit with a charge electrocircuit for being charged by the electric energy the charge electrocircuit, another set-up circuit is coupled to the battery for receiving the electric energy from the battery and includes an output device for coupling and supplying the DC electric energy to a failed or weak or not charged battery of a vehicle, and an inverter circuit is coupled to the battery and includes an output device for coupling and supplying the AC electric energy to charge various electric facilities.