IPhone 12 mini sudden Battery issue?

[Chedoka]

So I'm not sure how to ask but can you check if apple has loaded a program or update that drains batteries of older model phones.

 

-The Issue

 

i have an iPhone 12 mini that is mainly only used for work calls and nothing else. I disabled automictic updates like apps and syncs like emails but do update and sync on weekends. now generally on full charge with little use in the day the phone would be around 40 percent by end day (5am-8/10pm) and could still most often last two days without use. 

 

however, a week before the new iPhone 15 was to be released my phone suddenly started acting funny and its battery died way to fast, now on full charge at 10pm i would wake up to it at 44-30 percent at 5:30am (my work alarm) and if i go to work with a full charge (100% at 5:30am) it be at 20% by 2:30pm and that's with data off and Wi-Fi off (also tried airplane mode). so I'm going to get its battery checkout, but can someone ask around if this is common (or a way to test this)

 

there also been a new OS update the phone did 2 days after the battery problem started.

 

edit 09-25-23

So i doubled check every app and battery info. battery says its max cap is at 88% total and it did have the optimized charge and clean energy on but it turned them off now. also i check battery (Battery use and activity) and history for the last 10 days especially the days it drained fast and there's nothing running in background except home screen.

Edited September 26, 2023 by Chedoka

[rippy4500]

I noticed my 13 mini drained battery a little faster and also broke some apps after updating to ios 16, im not updating to ios 17 over fear it will make things worse. Unfortunately this is just how apple is and theres not much that can be done.

 

You said you disabled app updates but have you disabled ios updates? Just disable stuff you dont use like apps you arent actively using, or anything that may happen in the background. And also things like bluetooth, airdrop, etc. all use battery even if not being actively used so id disable those if you dont use them.

[WhitetailAni]

7 hours ago, Chedoka said:

there also been a new OS update the phone did 2 days after the battery problem started.

The first few days of a major OS update (iOS 15 -> 16, 16 -> 17) etc will be battery heavy as the phone has to index. 

[E-waste]

Just guessing:

 

Turn on power saving mode 100% of the time.

 

Go into every single app in the settings page, and individually on every singoe one, turn off the iption to "learn from this app" whatever it is called.  Also turn off background app refresh if that still exists as a setting.

 

Turn on the battery aging protection in battery settings, to stop charging past 80%/

 

In search / siri turn off everything you don't want to search for when you use it.

 

Delete all recently installed apps, and find alternative versions from different software companies, or use a web browser (safati recommended, or firefox) to access the same services, so programs installed do nat have to ability to run in the background.