Teardown reveals big changes inside the Apple Watch Series 4

Enlarge / iFixit opens up the Apple Watch Series 4. (credit: iFixit)

Apple announced a number of features that got people excited for the Apple Watch Series 4, and its redesigned internals show how much thought the company put into its latest smartwatch. iFixit tore down the Series 4 and found a few interesting tidbits about the Watch that prove it represents a thorough redesign of the original device, making it a more repairable wearable.

Despite having the same estimated battery life as the Series 3, the Series 4's new battery stands out among the details of the teardown. A 1.113Whr battery powers the Series 4, which is larger than the 1.07Whr battery in last year's 38mm Series 3 but smaller than the 1.34Whr of the 42mm Series 3 (iFixit tore down a 44mm Series 4, which is the new equivalent to a 42mm Series 3).

It appears Apple tried to achieve a solid middle-ground with the battery's size, while relying on other hardware and software improvements to do extra work in maintaining overall battery life for both the 40mm and 44mm models. Both are expected to last up to 18 hours on a single charge.

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