If you have been to the Apple Watch webpage, you see that Apple has never listed the battery capacities for any of the Watch models the company introduced. However, MacRumors has obtained those details from a Chinese regulatory database for the newly-announced Apple Watch Series 9 and Ultra 2.
For the Series 9, the 41mm and 45mm models are equipped with 282 mAh and 308 mAh batteries, respectively. Those remain unchanged compared to the previous (respective) Series 8 models as you can expect the same battery life of 18 hours as before. The battery life varies based on usage and configuration.
For the Ultra 2, the battery capacity increases to 564 mAh, which is a 4% increase compared to the previous Ultra’s capacity of 542 mAh. Remember that the display’s maximum brightness has increased from 2000 to 3000 nits on the Ultra 2, so it may balance out the 36-hour battery life as the original Ultra.
Both the Series 9 and Ultra 2 feature the vastly improved S9 SiP, which enables faster performance, on-device Siri processing, and Double Tap coming at a later software update. Both of them are available to order, with initial shipments available to customers starting September 22.
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