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GreatShield smartphones, unlocked cellular phones, new cellphones, cellphone accessories, wireless products and parts. The world’s thinnest iPhone 4 case with battery charger that nearly doubles the life of your battery. This case will give you the freedom to use your iPhone 4 without the daily worry of running out of battery life! Enjoy your iPhone 4 for voice, music, video, face-time, games and business applications with extended, stable, and rechargeable power. You can now experience up to two days or more of uninterrupted iPhone power, depending on usage.
Combination of a battery and a case
Charge and sync in the case
Lightweight low-profile design
Charge iPhone 4 and extra battery simultaneously
Four-LED battery charge status and charge progress indicator