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iPhone XS and XS Max Have 4GB of RAM, XR Has 3GB; XS Max and XR Have Larger 3,174 and 2,942 mAH Batteries - MacRumors
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iFixit: iPhone XS Has 'Notched' Battery and iPhone XS Max Has Apple-Designed Power Management Chip [Updated] - MacRumors
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Amazon.com: Battery Case for iPhone Xs Max, Upgraded 10000mAh Slim Portable Protective Charging Case Compatible with iPhone Xs Max (6.5 inch) Rechargeable Battery Pack Charger Case (Blue) : Cell Phones & Accessories
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Amazon.com: NEWDERY Battery Case for iPhone X Xs, 10000mAh Rechargeable External Charging Charger Case Compatible iPhone X Xs 10 (5.8 Inches Black) - Extended 300% Battery Life : Cell Phones & Accessories
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iFixit: iPhone XS Has 'Notched' Battery and iPhone XS Max Has Apple-Designed Power Management Chip [Updated] - MacRumors
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