Battery drain since iOS 15.6 is ridiculous

As everyone posting in this thread is just complaining, and no one is willing to consider troubleshooting their problem, I’m giving up.

My last advice:

• Apple doesn’t read ASC looking for issues; this is a user to user forum, so saying that “Apple must do something” is as effective as shouting it into the Grand Canyon.
• If you want to passively let Apple know, use this link→Product Feedback - Apple. They will record your issue, but won’t respond.
• If you want to actively let Apple know and get help from Apple, click on Get Support at the top of this page.

Memejojo73 wrote:

as it lasts a max of 2/3 hours with Strava running, all because of the background photos drain on the battery

If you are experiencing any difficulty with third-party apps or a specific website then please contact the app developer or site publisher/host directly --> How to contact an app developer - Apple Support

gian152 wrote: "...Apple tech kindly do something about it. Hope you release the fix so soon."

Although Apple administers these communities, that doesn't include reading each of thousands of daily posts for possible feedback. However, Apple will "read all feedback carefully" here:

iPhone Feedback

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feliperj wrote: "iPhone 6s+ (...) Battery health 92%."

92% implies the battery has been replaced. Was it replaced by a qualified technician using a genuine iPhone battery?...

About genuine iPhone batteries

Repair Provider Verification - Official Apple Support

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That is a totally different issue, and has nothing to do with the subject of this thread.

How long has it been since the phone was new? The drop in maximum capacity is not always linear, but on average it will be about 1% a month for the average user. So if the phone is 3 months old or more that is a reasonable drop.

Batteries are consumables; they lose a little capacity every time they are discharged, then recharged. On average this works out to about a 1% loss for every 25 “full charge cycles”. As one example, if you charge the phone overnight, every night (and that is what you should do; it is a best practice), it starts the day at 100%. If it drops to 20% by the end of the day before you charge it again overnight that counts as 0.8 full charge cycles (20% to 100%), or about 24 full charge cycles per month of use. For this example your battery capacity will lose about 1% per month. Of course, if the end-of-day level is higher than 20% the capacity loss will be a little less, and if it is lower than 20%, or you charge it during the day, the capacity loss will be higher.

Once the capacity drops below 80%, or if there is a message in Battery Health that the battery is not meeting peak performance expectations, it’s time to change the battery→iPhone Battery Replacement - Official Apple Support

The absolute best way to get maximum use on a charge, as well as slow the decline of battery capacity long term is to enable Optimized Battery Charging (Settings/Battery/Battery Health) and charge the device overnight, every night. The battery will fast charge to 80%, then pause. During the nighttime pause the phone will use mains power instead of battery power, allowing the battery to “rest”, and thus reducing the need to charge the battery quite as often. The phone will resume charging to reach 100% when you are ready to use your phone; it will “learn” your usage pattern. If you enable iCloud Backup (Settings/[your name]/iCloud - iCloud Backup) the phone will back up overnight also, assuring that you can never lose more than the current day’s updates. Here's more information→About Optimized Battery Charging on your iPhone - Apple Support

rwps wrote: "Yes original battery, but the phone was replaced with new under warranty, just before the 2yr warranty expired - so the phone is a couple of years newer. Battery capacity is 81% - it still works very well (except since the update :)..."

rwps ~ So how many years has this battery been used?

81% max capacity is weak and probably explains the symptoms.

Also, the long process of applying an iOS update to an old iPhone 6s Plus with a weak battery can be the proverbial "straw that broke the camel's back." Users then mistakenly blame the update instead of the weak battery. So have the battery replaced and all will (probably) be well:

iPhone Battery & Power Repair

About genuine iPhone batteries

Repair Provider Verification

(Articles found by searching Apple's Knowledge Base.)

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How long have you had your iPhone 13? In normal use maximum capacity will drop about 1% a month, so if you have had it for more than 4 months 96% is about right, or if much more than 4 months, better than expected.

Batteries are consumables; they lose a little capacity every time they are discharged, then recharged. On average this works out to about a 1% loss for every 25 “full charge cycles”. As one example, if you charge the phone overnight, every night (and that is what you should do; it is a best practice), it starts the day at 100%. If it drops to 20% by the end of the day before you charge it again overnight that counts as 0.8 full charge cycles (20% to 100%), or about 24 full charge cycles per month of use. For this example your battery capacity will lose about 1% per month. Of course, if the end-of-day level is higher than 20% the capacity loss will be a little less, and if it is lower than 20%, or you charge it during the day, the capacity loss will be higher.

Once the capacity drops below 80%, or if there is a message in Battery Health that the battery is not meeting peak performance expectations, it’s time to change the battery→iPhone Battery Replacement - Official Apple Support

The absolute best way to get maximum use on a charge, as well as slow the decline of battery capacity long term is to enable Optimized Battery Charging (Settings/Battery/Battery Health) and charge the device overnight, every night. The battery will fast charge to 80%, then pause. During the nighttime pause the phone will use mains power instead of battery power, allowing the battery to “rest”, and thus reducing the need to charge the battery quite as often. The phone will resume charging to reach 100% when you are ready to use your phone; it will “learn” your usage pattern. If you enable iCloud Backup (Settings/[your name]/iCloud - iCloud Backup) the phone will back up overnight also, assuring that you can never lose more than the current day’s updates. Here's more information→About Optimized Battery Charging on your iPhone - Apple Support

RS6DS3CS1 wrote:

FIX THIS PLEASE, or I’ll switch to a different phone.

No one participating in this thread can "FIX" anything on your phone and threatening to buy a different brand of phone won't change that.

If you're having problems with your phone, I suggest you contact Apple directly:

Genius Bar Reservation and Apple Support Options - Apple

No, there is no ploy to force customers to buy new phones. It sounds as if you may have optimized battery charging enabled.

See here:

About Optimized Battery Charging on your iPhone - Apple Support

Also:

When to charge your iPhone or iPad - Apple Community

Hi Alancito

Yes original battery, but the phone was replaced with new under warranty, just before the 2yr warranty expired - so the phone is a couple of years newer. Battery capacity is 81% - it still works very well (except since the update :)

I took screenshot earlier, and you can clearly see the very odd drain around 6am (when my wife got up). And the greatest battery use for the whole last 24 hrs is 25min of safari. This has happened multiple times since the update

You seem to be in low power mode, and what’s probably happening is the photos app is waiting for you to turn off low power mode so it can finish updating its database. Turn off low power mode, connect the phone to power for a few hours.

Same problem with my iPhone 13 Pro. Just updated to iOS 15.6 yesterday from iOS 15.5. I don't run a lot of apps ... read two newspapers, talk, text, and take a few pictures. From a full charge, phone drained to 20% in a couple of hours of nearly none use. iPhone 13 Pro got so hot in my pocket that I had to take it out and shut it off. This is not the first time I have had Apple battery issues after an iOS upgrade.

What app is using the most energy? After an update some apps (photos, especially) reindex their databases; this can take a day or two because it is a background process. So you can’t really get an accurate measure of battery usage for a couple of days after updating. You should also try restarting your phone any time battery drain is unusually high.

Same here. Upgraded my brand new iPad Air from 15.3 to 15.5 then to 15.6. Battery is draining like a timer. My Xs Max even worse now coming from 14.8 with 96% battery health. I even lost another 2% battery health after upgrading to 15.6. Waited two months for this and look at it.. Hope Apple resolve this.