Ultra Slim iPhone5 External Battery Case With Flip Cover and LED Battery Status Indicator, Metallic and Black Design Battery type: Rechargeable Lithium Polymer, capacity: 2800mAh Elegant slim figure won't make your Iphone look bulky. Lightweight (2.9 oz) Dimensions: 5.2" x 2.4" x 0.4" features: Stand and Battery Status Indicator on the back of the case.