This invention relates to a portable charging equipment in which a socket is provided on side edge of a backup battery and a plug is correspondingly provided on a charger device. A recessed arc portion formed on the bottom surface of the charger device is to abut closely against the peripheral outer edge of the backup battery. A boost unit provided in the charger device is electrically connected to the plug, and a lead wire connected to the boost unit has an output terminal provided on the other end. A tightening strap body having hook and loop structure is attached to the charger device. The backup battery and the charger device can be inseparably affixed together by the fastening action of the tightening strap body.