7 Limit the Wake Time. Furthermore, you should also limit the amount of Wake Time for the Apple Watch. You have the option of keeping it at 15 seconds or 70 So you could do this and then add each app you need separately to test which one is causing the battery drain. Show more Less. Reply. Link. User profile for user: tmaddox80 tmaddox80 User level Since the latest update, my Apple Watch has been draining twice as fast to begin with, now 8x fast. 100% at 8am now 14% at 12:30pm Thebattery also degrades over time. An Apple Watch that's a few years old won't hold as much charge as it did when it was new. It should take your Apple Watch between 1.5 hours and 2.5 hours to fully charge to 100%. It should charge to around 80% in less than 1.5 hours. Inthe drain test, the iPhone 13 running iOS 15.4 lasted for 8 hours 26 minutes, slightly less than its runtime of 8 hours 34 minutes while running iOS 15.3.1. Similarly, the iPhone 12 saw its runtime going down by 22 minutes on iOS 15.4 — from 6 hours 34 minutes on iOS 15.3.1 to 6 hours 12 minutes. The iPhone 11’s runtime remained 10:18 AM in response to alma1090. Same problem, everything normal until 10.0.1 update. Now watch runs down to 10-20% after 16 hours. Used to be good for 30-35 hrs. right up until this update. The optimized Managethe Display. Turn Off Background App Refresh. Use Low Power Mode. Optimize Battery Charging. Unpair Your Apple Watch Ultra. Before you make an appointment, you should try and fix the issue 5:18 AM in response to Calvin_tbr. Yes, mine too. I updated my watchos 10 yesterday (September 18, 2023) and my watch battery drains in 2 to 3 hours. I charged it 100% again at 4pm and by 7pm it was 33% and that’s almost doing nothing most of the time. Before WatchOS 10 it use to be so normal and I had charge almost whole day. NowiOS can act as the server backing the Apple Watch as it offloads all of the third party app workload to the iPhone. Basically, you measure the usage on both devices. Try some changes to minimize the highest users, and then repeat to balance functionality and energy use. Before watch, my iPhone 6 would end the day with 50 to YesterdayI updated my Apple Watch Ultra to watchOS 9.3, when I removed it from the charger the battery level was at 80%, this happened around 7:30 PM. Today around 4:00 PM the battery was at 16% already, so that means that in 20.5 hours my AW drained 64% of the battery. That concerned me since my AW normally drains less than 50% in 24 Aftersome testing, the issue is definitely specific to cellular battery drain. When I disable cellular and use the gps, battery drain is within the normal range. When the watch is operating on cellular+gps, there is excessive battery drain. For now, I am disabling cellular during my runs and hoping Apple fixes this issue in the next update. 50tbyEN.