IOS update 12.3.1 now Battery draining

I posted in this thread earlier that I had fast battery drain with iPhone 7 and update to 12.3.1. Tried to reset it and back it down to iOS 12.3. That failed. Then I started to lose my Verizon network. Could not get signal. Wasn't getting phone calls or most messages coming in. Total pain in the butt. Got lost using Google Maps gps too. Took the phone to Apple store. They said they believe it's the logic board. That will be replaced as well as the battery the tech thought even though the battery did not appear to be at issue. I have a loaner iPhone 6 running 12.3.1 without issue. So did 12.3.1 fry my logic board? Don't know.

So last night I did a DFU restore and set mine up as a new device. The drain still exists!!

Gonna give it a couple of days to see if things turn back to normal.

By the way in battery usage my screen off time always stays at zero.

This is how the usage has been. But none of these 3rd party apps are the case at all. Because both the times where I did the reset from phone and iTunes I’ve let the phone in standby without installation of any apps for roughly 5-6 hours. During that time the battery drains the same way and under usage it shows nothing.

I turned off all notifications on my iPhone, shut off all background refresh even turned off phone message notifications and charged 100% last Tuesday. I called my dad and we talked 11 minutes and battery was down from 100% to 68%. From an 11 min call

Yes!!

I updated my phone a little over a week ago and within about 3 days my battery started to drain at lightning speed.

I went online for 45 min and my battery went from 89% battery to 36%. My battery was fine before the last update, I could go all day on one charge but now I'm having to charge my phone at least 3 times during the day. Its really starting to **** me off!!

I have updated all apps and still have the battery drain-go figure.

It is the apps that have NOT been updated that are causing my drain: MAIL and SAFARI.

I would be interested if you are running these apps successfully without draining your battery?

BTW, what model phone so you have?

Your post was deleted because Apple takes all threats of legal action seriously. If you are using 12.3.1 you should update immediately to 12.4.1. Which may solve the problem, although the problem has ZERO to do with the version your phone is running.

Talked to technical support. They ran phone analytics/diagnostics and told be that everything looks fine with my phone and battery. Told me the remaining option is to get a replacement battery. I told technical support that I just replaced the battery on 3/9/19 (7 months ago) and I don't think the battery is the issue. This feel on deaf ears. I read all the responses here and understand that it's most likely the IOS 13.1.2 update. However, for the sake of avoiding an argument, I have an appointment set-up tomorrow at an Apple Store to replace the battery at my cost. I'll update when I learn more.

12.3.1 update causing battery to drain over night while phone not in use.

12.4.1 fixes a gaping security vulnerability in 12.4, so unless you want your phone to be at risk of being hacked you will update to it.

Thanks Frankfrommn. Please post your experience after replacing the battery.

I’m having battery issues with my IPod Touch 6th gen. Battery shows low right after coming off the charger. It will **** fine but show 60 to 80 % immediately when connected to a charger. I can usually listen to about 30 to 45 minutes of a podcast before it dies.

I've had an iPhone for 10 years now. I currently have an iPhone 7+. This is not the first time an iOS update has caused major battery life issues for me. I do nothing on my phone and it says that iMessages has used 23% of the battery in just a few hours (I think I got 2 texts during that timeframe). This is just ridiculous! My battery went from lasting all day with plenty to spare to me needing to charge it 2 times a day! I see that several folks have found workarounds, but we should not have to wipe our phone or downgrade it to fix Apple's problem. They should provide a fix and NOW!

Apple needs to get their act together and do a little QA on their software releases. I need a reliable phone and cannot be tethered to a power supply all day. No wonder they are beginning to lose market share. Steve Jobs would be ashamed! I'm seriously considering getting the new Pixel3.

IOS 12.3.1 update.

Battery lasts less than one day.

I usually have enough battery for 2 days because I don’t use my phone excessively.

Since the last update, it barely lasts one day. I’ve charged my phone yesterday evening, I had 70% at 7 this morning, and at 2 pm I’ve only 30% left. And I only used for a few emails, 30 minutes of musique and some shopping online.

So I really think something’s wrong.

Yes, my phone goes dead after 3 hours of use now!!! 2 hours of YouTube and 1 hour of Safari took it from 100 to 0, it’s ridiculous. I never had any issues before the 12.3.1 update, now it’s terrible. I have watched it lose 10% within 30 seconds of opening Waze, who can operate their daily routine if their phone constantly has to be on the charger???It makes you hate your Apple, that’s for sure.