... other 5V rechargeable equipment . Specification:Product Name:Portable Charger for galaxy S2Product Model:i4500Internal Battery type:3.7V Li-polymer cellsCapacity:4500 mAh Input ... yearCertification:CE, FCC, ROHS, PSEOthers :OEM supplier. iOCTOPUS 4500mAh portable charger for Samsung galaxy S2