This stylish iPhone case combines a protective case and an external battery into one. It features a slim, compact shape that delights the users. Designs of different battery capacities and colors are available for you to choose from.

• Output voltage: 5V.
• Cell type: lithium-polymer.
• Operating temperature: 0-45.
• Compatibility: apple iPhone 4/4S black/white.
• Package: protective case, battery, micro USB charging cable, user guide, etc.
• Capacity: +0.5 (1,050mAh), +1 (1,800mAh), +1.5 (2,700mAh), +2 (3,500mAh).
• Standby time: 200 hours, 342 hours, 532 hours, 694 hours (from +0.5 to +2).
• Charging current: 500mA, 500mA, 1,000mA, 1,000mA (from +0.5 to +2).
• Overall weight: 107g, 119g, 134g, 146g (from +0.5 to +2).