QQ-Tech&reg; Energy Expert: External Protective Leather Case & True 1800 mAh Extended Battery Case Backup Charger Power Bank for iPhone 4 4S (Fits All Models iPhone 4S /4) Q8L/W Stylish well designed slim case makes your iphone unique and shinning among others; Durable case provides good protection to your iphone from bumps and scratches; Truly 1800mA battery gives you another 85% - 100% charges compared to your original battery; High quality neat product; highest value! world's first and only leather case with high capacity battery; full pretection and longer work.