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iPhone 11 Battery Case, Exgreem 4500mAh Ultra Thin Rechargeable Portable Power Charging Case for iPhone 11 Extended Battery Pack Power Bank Charger Case (Black) - Walmart.com
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Apple's iPhone 11 Smart Battery Case review: This battery case proves useful in more ways than one | ZDNet
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iPhone 11 Pro Max Smart Battery Case enhances the camera, but the battery may not be necessary - 9to5Mac
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Apple Advises iPhone 11 Smart Battery Case Users to Update to iOS 13.2 to Ensure Camera Button Works Properly - MacRumors
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