The first iPhone XS teardown has been completed and shared online.
Repairability vs reliability: Apple argues that removable batteries add a potential failure
iPhone XS - Wikipedia
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iPhone XR Features A Battery Cell Bigger Than The iPhone XS, Reveals Teardown
iPhone X Teardown: TrueDepth Camera System, Stacked Logic Board With 3GB RAM, and 2,716 mAh Battery - MacRumors
Apple's iPhone X Compared to the Original iPhone
iPhone XR teardown shows few differences versus iPhone XS [u]
iPhone 8 schematics reveal bezel-less front, rear TouchID and more
First iPhone XS Teardown Reveals One Major Change vs iPhone X
iPhone XR Features A Battery Cell Bigger Than The iPhone XS, Reveals Teardown