My Apple Watch Ultra OS 9.6 battery drains too fast

I’ve had the same issue and seem to completely coincide with the ios 9.6.2 update. Watch was losing 70-80% of battery in about 8 hours. I called Apple support and they did a diagnostic check on my Series 7 battery. Everything checked out OK. I had a theory that the update was causing a program or something to run in the background on my watch that you cannot see. So, to test this I charged my watch fully and closed the “fitness” and “health” apps. If I used those apps throughout the day, i closed them after use. For the day I tested this, my watch went from 100% down to 38% in a 24 hour period…..a huge increase in battery oerformance. I think there is something in the update that tied to one of these apps that is drawing on the watch…..just my un-scientific 2 cents.

Day 1 of an update is a little early but as these were only security patches make sure you have no VPN or any security (so called) apps on the iphone.

Apple Watch uses a LOT of battery - Apple Community

There is a LOT to try there

Incredibly 9.6.3 still drains the battery 🤷‍♂️

My Apple Watch ultra is dead after the 9.6. Won’t take a charge. I have tried multiple times on all apple brand charging accessories and nothing happens. I will be calling apple support as soon as I can.

This update has messed up my Ultra’s battery life. It has gone from 100-0% lasting 56h to about 12h before it dies. The worse thing about it is that you cannot downgrade. Only option is to go to the WatchOS Beta.

I hope a patch is made available soon to address this issue. The main reason for upgrading for me was the extended battery life over the normal Watch.

Very disappointed with their QA on this version…

@Apple, when will there be a patch for this? It's still happening to my watch! It feels very ridiculous to charge my watch THREE times in one day. I've only had it for about 6 months, and I traded in my previous watch, which lasted me until evening - for a watch with better battery power. I guess you tricked me.

It’s not just the ultra watch the regular watch also drain fast. Before the update after 18 hr of use i was at 50% and above

now it’s almost dead like 5%. I didn’t change anything. Just the update.

Updated to 9.6.2 battery draining even faster than before. From 100 - 80 is under 2 hours.

The ultra died. Would not take a charge or turn on. Sent it off for repair.

I was putting off 9.6 for a while, just updated last week. Now getting half the battery life I was getting before. 100% to 20% in 12 hours (used to be able to charge just in the morning…)

have the same problem but worse. Had 100% coming down to 10% in 6 hours. i did the update last night and this drain happened this morning.

It was perfectly normal lasting 20 hours and after 9.6.2 the battery ends after 6 hours, maximum