Apple Watch Ultra battery is much larger than Series 8's

New regulatory filings show that the Apple Watch Ultra has a battery that is 76% larger than that in the Series 8, and more than double the size of the small Apple Watch SE.

Apple prefers to talk about battery life in terms of hours of usage, and at launch it claimed a maximum 60 hours for the Apple Watch Ultra. That's using a low power option, which also raises the Apple Watch Series 8 to a maximum of 36 hours.However, specific details of the battery capacity have now been listed on China's 3C certification database. As first spotted by MySmartPrice, the Apple Watch Ultra contains a 542mAh battery.