The iPhone XS and Max do fine on the battery life test, but fall short of one Apple claim - PhoneArena
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The iPhone XS has a smaller battery capacity than the iPhone X - NotebookCheck.net News
iFixit: iPhone XS Has 'Notched' Battery and iPhone XS Max Has Apple-Designed Power Management Chip [Updated] - MacRumors
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iPhone XS teardown reveals L-shaped battery and more watertight seals - GSMArena.com news
iPhone XS, XS Max, XR specs: Battery size, RAM details revealed in new filings | ZDNET
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Apple iPhone XS Smart Battery Case Review: Worth Your Money?
iPhone XS Max Smart Battery Case - Black - Walmart.com