Apple Watch Series 4 teardown reveals big changes on the inside

Apple’s iPhone XS, as good as it is, isn’t all that different from its predecessor, the iPhone X — even on the inside

But the company’s Apple Watch Series 4 is a major update compared to Series 3, and it’s all the more apparent when you tear it down to bits. 

We already knew that the Watch 4 is slimmer compared to Watch 3, with a bigger screen and new heart-rate sensor. In this detailed teardown, conducted by iFixit, we see just how different the two devices are; just look at the x-ray photo, below. 

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