The Energenie ChargeGenie is the world's first universal portable smartphone charger. Whether you own an Android, Windows Phone or BlackBerry handset, the ChargeGenie external battery delivers that emergency battery charge when out and about. With its innovative gel pad design, the ChargeGenie clamps to the back of any smartphone but is also easy to remove and clean once charging is finished. And this curvaceous battery pack will never wrestle free - the charger's flexible centre spine design allows the battery to bend and follow the handset's contours for a secure fit.