This external battery charger case works for iPhone 6, 6S Plus, 7, and 8. It has powerbank capacity of 2500mAh to 3650mAh. It combines two sought after features of protection and additional power supply. With its ultra slim and sleek design, it won't stick out like a sore thumb when you place it beside your iPhone. This is a charger that is sure to be a favorite among iPhone fanatics. It is practical and stylish at the same time.