IOS 13.5 battery drains!!

Hey folks - just to provide some findings (not entirely scientific, but from a household that has iPhone 6s, 8, 8 Plus, 11, and 11 Pro Max). We've previously had an iPhone 7 (whose battery was pretty bad) and iPhone Xs (whose battery was awful - we had it replaced twice before rage-trading it in on an 11 last year).

Disclaimer - my kids and wife love to keep brightness at 80-100%, which clearly doesn't help battery. [facepalm]

Second disclaimer - no cellular - we're 100% WiFi even in our 4G-enabled car (cellular is known to nuke batteries on older iPhones - including the aforementioned Xs)

For this thread, I'll focus on the 8, 8 Plus, and 6s battery life.

1. Last week, my daughter switched from the 8 Plus (100% battery of new) to the 6s (94% battery of new). Why? It's smaller (fits in her hand), has a headphone jack (this has become a major issue with the 8 and newer), and it has a dog photo on the case.
2. The last three days, she's been using it for 3-4 hours.
3. USAGE - purely watching YouTube Kids (like 99% of usage), she burned 48% of battery (from 100% > 52%) in 2 hours, 57 minutes. This equates to nearly six hours of video watch time. (I know Apple claimed 10+ hours of HD video when new, but I've never come close to seeing that)
4. USAGE 2 - when going lighter - text messages/iMessage, Safari, etc. - she gets about 8-9 hours of estimated usage.
5. I can't confirm what the total usage time will be - i.e. will the phone just die/shut off at 10%? 20%? I don't know.
6. My son uses the regular iPhone 8. He's getting an estimated 5-7 hours usage (video + FaceTime), with 86% battery of new. NOTE - in the first 18 months (2017 > 2019), the battery of new went from 100% > 88%. So by disabling cellular, and using basically as an iPod++, it puts less strain on the battery.
7. The iPhone 8 Plus is still very, very good. My first one (of three - it was stolen) got an estimated 16-18 hours - as a cellular device/phone. My second one (global unlocked) got 12-13 hours on iOS 11 and 12, and eroded to about 10-11 hours on iOS 13. The third one (warranty replacement) is back to 13-14 hours on iOS 13.6 - as a NON-cellular device. I've proven that this week.

If you would like for Apple to "consider this," then I suggest that you submit your concern directly to them here:

• Product Feedback - Apple

I don’t think apps are the source this time. Because I didn’t launch any app excepts for Safari, mail and maps after reboot, and still get 20% battery drain in 10 minutes.

I suspect the culprit is Location Service, that this symptom happens after I launched Maps for 3 minutes or so. I shut off Maps.app before I lock screen and put it back in my pocket, and 10 minutes later the battery dropped from 95% to 75%. I don’t have any other apps running in the background.

There is a difference between restore from iTunes and restore from iCloud. If You restored iPhone via iTunes than that will not help. iTunes backup is different than iCloud and the problem could be restored with it.

It simply didn’t work. Yes I wiped the phone. Yes I reinstalled iOS from iTunes following you instruction. And yes I restored from iCloud backup. It simply didn’t work. Still 10% drain in 3 minutes without any app running after 1 day stay in idle, low power mode on, and location service turned off.

And then I wiped it again, reinstall iOS again, and instead of restoring from backup I set it up as a new phone, but everything is still the same. 10% drain in 3 minutes without any app running after 1 day stay in idle, low power mode on, and location service turned off.

It seems that keeping 4G connected exhaust all its power. No 4G signal strength here doesn’t have significant change in the past few months.

@peter - do you work for Apple?

Did you bother to read the thread above?

replaced batteries are not the solution. That’s why there is a pending [redacted by Apple mods].

all of mine have replaced batteries, and batteries is (are) having issues..

i think the solution will either be an OS patch or apps will have to fix their background handling.

I gave up and updated to 13.6 beta.

It's better.

Was it powered down or you just shut the screen off?

If the latter then processing of photos social media and emails will continue.

Tip: Leave it on charge all night.

Tried. Didn’t work. Battery still drain for 20% in 10 minutes.

All app closed and screen locked. Background refresh disabled. Cellular signal is full. Lower power mode enabled. “Hey SIRI” and pickup-activate all disabled.

All these advises are only useful to save energy under normal circumstances. Draining 20% in 10 minutes without any usage is definitely ABNORMAL.

@LG53 - we had our battery replaced, it's still pretty iffy.

Others have high battery life ("maximum capacity" close to 100%), and still experiencing issues.

Not sure what's going on, other than planned obsolescence of five year old devices.

Get a case to keep the heat away from your hand.

Bloomberg and ESPN are the apps draining my iPhone and iPad.

100% background activity for hours on end.

I wouldn't trust the "battery health" in iOS. Mine says 99% but in reality it's closer to 93% capacity Per iMazing or coconut battery, etc.

iCloud Photo Library syncing is OFF when you enter low power mode. And battery drain issue still exist on my phone even in low power mode all the time. So no, it’s irrelevant to iCloud Photo.