Iphone 11 Pro, Mail app draining the battery in background.

I’m having the same problem with my iPad Pro. Deleting the mail app solved the problem for approximately 24 hours but Recently Deleted Apps started draining the battery. The only app I deleted recently was the mail app.

Very frustrating...

The same for me, my battery on my iPhone 11 Pro worked brilliantly and then suddenly it was draining at a rate of 40% an hour!!! Looking at the battery in settings and there was 1 minute and 18 hours background on the email app! I tried everything , deleting the app, reboot etc and it still continued. Finally I deleted the app again and did a reset all settings and perfect! I now have a loss of 30% battery in 24 hours...exactly as it was before. Don't bother rebooting etc, go straight to reset and delete the app. I’m now using Gmail app till Apple sort out this problem as I do like the email app they have .

Thanks to Jono2000 for the advice, it works a treat!

Update> sooooo frustrating , now the mail app is draining in the background even though I’ve deleted it.....20 hours in the background and my battery down to 3% overnight from 100%, so sick of this and totally fed up. I’m using Gmail and I honestly thought that once the mail app was deleted it seemed to solve the problem , it did for 24 hours and now it’s back. Any more ideas....Jono2000?

But I don't think it is due to iOS 13.4. My issue occurred when I'm still using iOS 13.3.1. That's why I updated my iOS to the latest version but nothing solved. Maybe the best temporary solution would be switch off your phone while charging and restart it when it is fully charged.

I'm having the same issues with a new iPhone 7. Battery drains rapidly and goes from 100% to 40% overnight. Apple Support are trying to help and we have reinstalled the latest update for iOS, deleting the reinstalling the mail app and even switching off one of my three mail accounts. All still to no avail. Apple Support are going to look at it again tomorrow. There seems to be some sort of bug somewhere. My phone also gets hot when charging and hot when in use. I'll report back if we get any further over the next couple of days.

I had the same problem with my new iPhone 7. After numerous calls with Apple Support who really tried to help I think we have found a solution. My phone was draining quickly and it showed the Mail app using most of the battery power. We did try a normal restore and that didn't work. I therefore cleared the phone down to restore but selected Manual Restore. This meant entering the mail accounts in separately. Apple thought there was an issue with the backup which was causing the phone to work extra hard. I am now trying to figure out how to get my apps transferred. I've added some individually but a couple do have data on them. Anyone any ideas on that?

However, it does seemed to have worked. Phone was draining from 100% to 40% overnight previously. Last night only dropped from 84% to 77%.

I was dealing with this issue for so long. Tried everything. The only thing that helped was to delete native mail app (which was still running in the background even when deleted) and restore phone, then restore data and never download native mail app again. As I figured out yesterday, there's a huge flaw in iOS and when your phone's acting like this, you are probably target of hackers. Apple is testing new version which will repair this flaw. But still huuuuuge problem.

https://www.pcmag.com/news/zero-click-iphone-attack-exploits-flaw-in-apples-ios-mail-app

Thanks for that update. My phone is behaving OK at the moment. I restored it completely from fresh and I've switched off the automatic back-up, doing it manually every couple of days. I agree a huge problem with this and the battery issue which Apple don't seem to want to acknowledge.

I have the same issue. I did delete all my emails and the mail app but it still has not helped. I am using outlook app now. When I look at the battery usage it always says recently deleted app is (still) running in the background. Somehow even after its deleted its still doing it. I have hard reset and everything else. Dang!

I’m sure any android you get will be ABSOLUTELY PERFECT. But explain that to my colleagues who constantly complain about the poor battery life of the android phones; most of them have switched to iPhones. But I’m sure you will not have the problems that they have.

The mail app drains the battery if you have mail set to Fetch or Push, because it will then download mail in background. Whether or not it is enabled in background app refresh. If you change all of your email accounts to fetch it will just as much energy, but it won’t do it in background.

But the simplest solution is to plug in the phone overnight, every night.