Smart Battery Case Replacement Program for iPhone XS, iPhone XS Max, and iPhone XR - Apple Support
Apple's new Smart Battery Case fits an iPhone X, but charging requires iOS 12.1.3
Apple iPhone Smart Battery Case review: Pretty good, if you need the boost - CNET
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Amazon.com: Apple iPhone 11 Pro Max Smart Battery Case with Wireless Charging - Black : Cell Phones & Accessories
Apple Smart Battery Case review: An extra day of juice and a handy camera button | Mashable
Smart Battery Case Replacement Program for iPhone XS, iPhone XS Max, and iPhone XR - Apple Support
Exclusive: First look at unreleased Apple Smart Battery Case for iPhone XS, three models and 2018 release possible - 9to5Mac
Apple iPhone 11 Smart Battery Case With Wireless Charging Black| Dressinn
Apple Smart Battery Case for iPhone review: great, but not for everyone - The Verge
Amazon.com: VOOE Battery Case for iPhone 11, Upgraded 6800mAh Extended Rechargeable Charging Case Protective Portable Battery Pack for iPhone 11 External Charging Cover 6.1 inch Smart Case - Black : Cell Phones & Accessories