Apple Watch battery drain after Update

Most people are seeing better battery life after 9.5.1. Did you restart your watch, after updating it? If no, restart your watch. Then give it a couple days as after any OS update, your watch has to reindex all of its data, which depending on how much memory you're using, can take a couple days.

On my iPhone, I went into the "Watch" application, then "General" and finally "Diagnostics logs". There were a few files, among which a "contactsd.cpu_resource-2023-06-27-172949.ips" log file containing this message about the contactsd process :

90 seconds cpu time over 172 seconds (52% cpu average), exceeding limit of 50% cpu over 180 seconds

It seems that the contactsd process could be the culprit, eating too much CPU and hence battery.

Could other people with the same issue check if they also have this error message ?

Presumably reset but didn't set up as new

Try this - on iPhone, Watch app, My Watch tab, where it says "Installed on Apple Watch"

Uninstall all of them and try it a day

They are all third party apps and subject to incompatibility if the vendor didn't test them properly

This is from pascal_sartoretti hopefully its help. Coz it works for me

I have had the same problem a few months ago (after a watchOS update), and again last week when upgrading to watchOS 10. In both cases, I solved it like this (see also my previous posts much above) :

• Un-pair the watch
• Re-pair the watch
• Restart the iPhone
• Restart the watch

It works, but it is a hassle : I lost the watch configuration each time and had to do it again by hand.

It is obviously a software problem, it affects many people and has lasted for a few months at least.

This is from pascal_sartoretti hopefully its help. Coz it works for me

I have had the same problem a few months ago (after a watchOS update), and again last week when upgrading to watchOS 10. In both cases, I solved it like this (see also my previous posts much above) :

• Un-pair the watch
• Re-pair the watch
• Restart the iPhone
• Restart the watch

It works, but it is a hassle : I lost the watch configuration each time and had to do it again by hand.

It is obviously a software problem, it affects many people and has lasted for a few months at least.

What I did is follow pascal_sartoretti suggestion hopefully its help. Coz it works for me

I have had the same problem a few months ago (after a watchOS update), and again last week when upgrading to watchOS 10. In both cases, I solved it like this (see also my previous posts much above) :

• Un-pair the watch
• Re-pair the watch
• Restart the iPhone
• Restart the watch

It works, but it is a hassle : I lost the watch configuration each time and had to do it again by hand.

It is obviously a software problem, it affects many people and has lasted for a few months at least.

Brilliant suggestion!! I powered my Ultra OFF & powered it back on. Battery life is restored to 48 hours after only lasting about 8 hours after the latest update.

Thank You!!

After about a month, I could solve the problem. I found the solution here, and it boils down to :

• Un-pair
• Re-pair
• Force restart iPhone
• Force restart Apple Watch

I don't know if the last two steps are required, but it worked (at least for me) : the watch battery now uses about 5% of capacity per hour, which seems back to normal for my watch and my usage.

Took the watch to apple shop, complained about it, they ran tests.

summary, excessive usage on the battery from the Bluetooth function.

I recommend users to have this issue of excessive battery drain after update 9.5.1 (like I have experienced) go to the Apple shop and ask them to run a test.

I’m sure Apple employees monitor these forums, and if Apple have a large base of users experiencing same issues, they will review how their update (9.5.1) has

caused this issue.

I’m also noticing that the battery drain is not every day, and days where I am exercising or away from my home network, i.e. on holiday, I don’t experience excessive battery drain.

I had to go to Apple Store and have their techs wipe it out, install the software back on AND I had to reinstall all of my apps individually. I uploaded my pics, notes and contacts to the cloud and got those back but all apps I had to do each alone. They said otherwise it would reinstall whatever the issue was back onto my phone. Now my phone is back to normal and so is my watch battery life. Before it was dropping connection/reconnecting and that was draining my watch battery… it stays connected and is back to its 2day life…

I had a similar problem but the battery didn't drain so fast, only maybe 50% faster. I solved my problem by unpairing the watch from my iPhone and repairing it. Check the Apple support website for instructions on how to do this. Click Here for Apple Instructions

I had this problem too, but if you unpair the watch with your phone, and then re-pair it it fixed the problem.

I think the link between your phone was broken, and then your watch is using more power staying connected to wifi networks and cellular networks.

try unpairing ,

I have had the same problem a few months ago (after a watchOS update), and again last week when upgrading to watchOS 10. In both cases, I solved it like this (see also my previous posts much above) :

• Un-pair the watch
• Re-pair the watch
• Restart the iPhone
• Restart the watch

It works, but it is a hassle : I lost the watch configuration each time and had to do it again by hand.

It is obviously a software problem, it affects many people and has lasted for a few months at least. What is Apple doing ?

Mine went crazy too. Down to nothing by mid afternoon.

Unpaired and set up as new watch.

Also erased iphone and restored from backup between unpairing and setting up watch

Now watch only used 40% in 16 hours.

I have found the battery isn’t draining as fast when I turned off the always on feature, which is used if you continuously want the watch to display the time even when your not looking at it.

To turn this feature off which is a default feature go to settings > Display & Brightness then scroll down to Always On and move the slider toggle to off.