Mondpalast 3500mAh External Battery Charger Case Black for Sony Xperia Z3+ Z3 PLUS Z3 plus E6553 3500mAh large power capacity can meet your needs several times A simple press of a button will allow you to charge your phone wherever you are and thus never run out of battery Precise circuit board prevents overcharging, short circuit and generating heat. CE RoHS approved For Sony Xperia Z3+ / plus