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

This is usually caused by an issue with a message being "stuck" and repeatedly attempting to sync from an Exchange account.

If that's the case, the only way to fix it is by deleting the offending message from the server.

yes that’s what happened to me, I’m not touching the mail app until it’s sorted. The funny thing is that it works on my iPad with no problems.....looks like iPhones and the mail app have an interference of some sort. Hopefully Apple will take note and do something about it. Between us Jono2000 we’ve given a solution to the many people who have this tiresome problem.

At the risk of tempting fate - I had the same problem on a iPhone 7. I wiped the phone fully and did a manual restore - adding all apps one at a time - very boring. I've also switched off the automatic I-cloud backup and now only backup manually every couple of days. That seems to have worked. The phone has been OK for a couple of weeks.

Yes, so that it has to be completely restored. It's a real pain but it did eventually work but mine is an iPhone 7. There is obviously a real issue with this which Apple don't seem to be acknowledging. I was on the verge of swapping to a completely different phone.

I’m furious about this, an iPhone 11 Pro isn’t cheap and I had to save up for it. I’ve always used Apple , iPads etc but I’m beginning to lose my patience I have to admit. Many thanks Joannie7. Stay safe wherever you are x

Okay my final update...I hope! Sat myself down and did a full restore, from scratch. But I decided to do a manual download as suggested by Joannie7 as opposed to a automatic one, each app downloaded individually...very boring and very time consuming. Got it all sorted and went to bed with a charge of 99%...woke up to a charge of 97%....yeehaaa! Up to now it looks like it’s working, I hope so or I’ll be throwing it out of the window. I don’t particularly like the Gmail app but at least it doesn’t drain the battery, I’ll continue with it until Apple get their finger out and sort out their own mail app. I hope this helps anyone with the same problem.

Thanks Jonno2000, keeping my fingers crossed, can’t even go to an Apple store as we are still on lockdown.

Exactly , their products cost enough, you’d think they’d want to keep their customers happy. Take care

Hi, the only way to stop it is to go and do a complete factory MANUAL reset. It’s an absolute pain because you have to manually download every single app and it’s boring and tedious but it means that you can skip the mail app. If you do an automatic download the mail app will be downloaded and you’ll be back to square one. The manual reset works wonderfully, The only thing is that you’ll have to use a different mail app, I’m using Gmail, it’s nowhere near as good as the Apple mail but......

Update : So...I decided to download the mail app on my iPad 10.5 yesterday. First I did the 13.5 update . Up to now it’s working perfectly with no battery background problems at all. It’s now been 24 hours and all is working well. I won’t be downloading it onto my iPhone 11 Pro though, until I actually see Apple state that there is a fix precisely for this problem I’ll be staying away.

Deedee22221111 wrote:

. I won’t be downloading it onto my iPhone 11 Pro though, until I actually see Apple state that there is a fix precisely for this problem I’ll be staying away.

Then you will never download it , because Apple is never going to make such a statement.

Sounds like a plan. Although you might consider that there are hundreds of millions of iPhones that don’t have this problem, so it might be worth troubleshooting why your phone out of those hundreds of millions uniquely has this problem.

Of course, no one actually cares what apps you have or don’t have on your phone. Not even Apple.

It’s not ‘uniquely’ on my phone, it’s on lots of others if you care to have a look. I’ve tried everywhere and everything possible to find out why this happens and there is NO answer. Even deleting it doesn’t help, the only way is to do a manual factory reset and not to download it...that has solved my problem.

Also I‘ve never been under the illusion that Apple care what apps I have or not....their answer would probably be the same as yours....unhelpful.