iOS 13.5.1 battery drain

From personal experience, recalibration of the battery in my iPhone X resulted in reducing the overall health by 2%. I followed the procedure to the T and it caused problems. I'm well versed in doing this on laptops etc where CPU performance isn't governed by artificial software throttling and it works brilliantly. However, if one was to perform the calibration process as a form of regular maintenance on any iPhone above series X, I would say that ultimately it would possibly do more harm than good as it would cause premature aging and thus cause iOS to start throttling performance once 'health' drops below this magic arbitrary percentage.

This is just my observation and I stopped once I noticed the apparent 'damage' it was causing the health to my battery.

I find 13.6 far better than 13.5.1 as now i feel better with 5 hours of SOT on my XS max with 13.6 which i was not getting with 13.5.1, only it reduces battery to 5% and 2% more when i turned off Wifi and everything, clear all apps and go to sleep and check back in 10mins.

I've put my phone on charger for an hour or so, pulled off at midnight (was charged to 60%) When I woke up it was on 15%!!! I was shocked my battery died or something. I've seen this when I checked battery usage. :/ The only thing I can think of is maybe live photos run in continuous play in background? (I have sent one yesterday which was on auto Loop/Bounce)... anyone else had similar?

My brand new iPhone 7 (new from a swap due to too poor cell service and too high battery drainage) is still a ghastly power pig.

I am low battery all the time, shut down all apps, even text messages all the time, leave nothing running... and still lose power. I am at top level iOS, no further upgrades available.

Safari is utterly unusable: 10 minutes of usage can drain 10-12% of the battery flat! YouTube the same. Even every shut off so that NOTHING RUNS... still leaves a point every few minutes gone.

A few minutes of music - ten percent gone. A bit of music and Bluetooth took me from 94 - to 88, then quickly down to 74. MUSIC is doing this!

Apple: you gotta do better with power. This is the second phone - and third battery I am roasting my way through.

Hot! Underpowered. Weak. Unreliable. Keep low power on always.

A phone cooking it’s battery to death when nothing at all! is running, is a sick phone!!!

I HAVE FOUGHT THIS SINCE MY FIRST IPHONE 7. They all needed full recyclying recharges multiple times a day.... which apple swears is not needed, or desirable.

i just roast the phone... and it’s doing nothing but playing paper weight!

Is it cell work: too much chatter with the tower? Is it poor turnoff of the apps? Is it wasted vast empty power by poor use of memory? Don’t know. No tool to tell. The darn phone should do this without extensive human intervention.

Sadly, even on this new phone, I do more power management then anything else, with pulling up apps fro a quick glimpse, only to shut it down for power usage, in just a couple of minutes.

APPLE, PLEASE FIX THIS. It’s my last shot! I will not charge a phone four times a day, just for light use... it’s way too much pain! It’s gonna be an Android next time...

(writing this review message took 4% of my low power mode power...)

Nothing to fix. Vast majority of phones have no problem

The next procedure is to restore your device, and setup the device as new without restoring a backup, to see if the issue is replicated. I would first make sure you have a backup so your data is saved.

Here is a guide for those steps:

How to back up your iPhone, iPad, and iPod touch

Restore your iPhone, iPad, or iPod to factory settings

and see how it goes

If no improvement send it for repair or replace

If it works well restore from backup but be prepared to wipe again without restore from backup. 

https://support.apple.com/en-us/HT204184

Same issue here with my iPad Air 3. I’ve done a full reset of the device and problem is still occurring. I’m losing about 40% charge overnight with no activity- see picture.

If you leave it on overnight the battery stays at 100% but turn it off overnight and when you turn it bak on in the morning it will be down 30-40 percent.

Please stop being hostile to others in this thread.

"...I solved my problem by completely restoring my iPhone 11 Pro (no backup)..."

well done and thanks for the feedback.

When I suggested that on page 1, page 2..etc I was pilloried.

Sadly, after updating to 13.6, iPad still burning thru battery. I’ve completely restored, nothing has worked.

Get a new battery

If the phone is powered off the only thing that can drain the battery is its own chemistry

it is impossible to edit comments in the timescale you suggest.

Thank you for this guidance. I’ll try it today.

I am a fellow user. I still own an iPhone 6s on an older unaffected software version. Have a nice day!

Thanks for all the suggestions. I will try them out.