Amazon.com: Replacement Battery for iPhone 4S - Compatible with A1387 CDMA & GSM Models : Cell Phones & Accessories
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Battery Life - Apple iPhone 4S: Thoroughly Reviewed
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iPhone 4 vs. iPhone 4S Specs Showdown - Fight! [Comparison Chart] | Cult of Mac
Complete Replacement Battery Kit for iPhone 4S + Extra Accessories – Cell Phone DIY
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