Apple Watch Series 9 Battery Specs Revealed – Watch Ultra 2 Sees Slight Capacity Increase

Details on the battery capacities of Apple’s latest Apple Watch Series 9 and apple watch Ultra 2 models have emerged thanks to a disclosure from Chinese regulators. The data reveals minor capacity increases for the Apple Watch Ultra 2 compared to last year’s original Ultra.

According to the regulatory database, here are the batteries powering the new Apple Watch lineup:

  • Apple Watch Series 9 (41mm): 282 mAh – Unchanged from Series 8
  • Apple Watch Series 9 (45mm): 308 mAh – Same as Series 8
  • Apple Watch Ultra 2: 564 mAh – Roughly 4% larger than 542 mAh in original Ultra

The modest bump for the Ultra 2 was likely necessary to maintain the same real-world battery life as its predecessor. Apple quotes up to 36 hours for both models, despite the Ultra 2 having a brighter always-on display.

In contrast, the Series 9 retains the 18 hour battery life of the Series 8 while sticking with the same size batteries. Power efficiency optimizations from the new S9 chip counteract the additional energy costs of features like the enhanced display.

Apple-Watch-S9

While the capacity gains are minor, any improvement is welcome for Apple Watch users. The extra juice provides a bit more headroom and longevity as batteries inevitably degrade over time.

But those hoping for a major boost to Apple Watch battery life will have to keep waiting. The new models focus on pushing other areas like displays, sensors, and performance over significantly extending runtimes.

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Max Hyland
Max Hyland
Long form contributor Apple iPhone, iPad, watch reviews, opinion, editorial

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