An apparatus for indicating remaining electric charge of a battery and a device for power supplying and recharging comprising the same are disclosed. The apparatus for indicating remaining electric charge of a battery according to an exemplary embodiment of the present invention comprises: a conducting part including a light emitting unit connected between one electrode connected to a positive electrode of the battery and another electrode connected to a negative electrode of the battery so as to emit light with luminance corresponding to a potential difference between the positive electrode and the negative electrode of the battery; and a nonconducting part preventing electric conduction by covering a remaining region other than parts of the battery to which the one electrode and the other electrode are connected.