Apple Watch battery
I charge my watch to 100% overnight, wear it to run for about 70 minutes & when I end my run the watch dies & restarts. When it restarts it says by battery is 10%.
M1 Mac mini, macOS 13.2.1; Watch, series 7 GPS/cellular, watchOS 9.3.1; iPad Pro 2nd Gen, iPadOS 16.3.1; iPhone 12 Pro, iOS 16.3.1; TV 4th Gen, tvOS 16.3.2; HomePods, audioOS 16.3.3 and Airport Express w/ Airplay 2