iPhone 7 Plus with iOS 13.4 battery drain problem

The problem with the battery app is that it only shows the apps that are taking up cpu time it doesn't show what the iOS is doing & that in the majority of cases is what's causing the problem & I know this because after a complete flat rebuild which no other configuration or apps installed or loaded the cpu was still running close to 100%.

Empirical evidence on this platform and from my own observations in a former job of mine has shown that restoring an iPhone can help solve battery drainage.

First go to Settings > Battery and see what processes/apps are using most of your battery. Also check app store / updates and see how many apps were updated.

In that case use the Feedback link to make sure you are heard: Feedback - iPhone - Apple

Do it now since iOS 13.4.5 is in beta.

Everyone should report the problem on the Apple feedback web page https://www.apple.com/feedback/iphone.html

I Think there's a modem problem. If you are connected to Wi-Fi, turn off mobile data to see the battery drain stop. Also , turn on Low Power Mode always.

Download System Status app

Have you contacted Apple support regarding this? If not then you may be waiting several updates for your fix.

Have you tried updating your iPhone? Have you checked to see which apps are using most of your battery?

I'm very sure I DO know what restoring an iPhone does, thanks. But restoring it hasn't fixed the battery drain issue. It fixes many issues, but not this one. Just look at these Forums to see that.

Again, please don't make mass assumptions that infrequent or lower-level-rated Apple Forum users are somehow braindead simpletons. We aren't. Just because you have 700 points, or are on Level Whatever, doesn't make you better than the rest of us.

Apple needs to fix this issue, and STOP having Level Whatever's constantly pass the buck onto user's, onto user's devices, and trot-out excuses about reindexing, restoring, or doing resets. The problem is inherent in the iOS itself. Something in the iOS is causing the drain!

Just one simple statementU

turn, on, low power mode

x

Jesus Christ God hasn’t anyone told you about the dumb low power mode feature d It’s a bloody beauty T

and are use it yJust one simple statement

I am also having a drastic battery drain problem since installing iOS 13.4 on my 10XR. It appears that Siri is taking 77% of my battery life and the phone now drains overnight. I never had this problem before. Strange that I updated my wife's 10XR and she does not have a battery drain problem. Her Siri battery draw is 4%. I contacted Apple Support via the app and was told it is a known problem and to do a Reset All. I did that but it does not appear to solve the problem. Still searching for a solution. Is it possible to go back to the previous iOS?

If you guy look on the net there is a lot more people with the same problem. I have battery drain on all my apple devices since the update. Apple ipad pro 12.9 3rd gen ifi 4g, iphone xs max, apple watch 5lte and my wife and my kids ipads from 2018. So there is clearly a bug on the new software

If nothing helped you should call AppleCare and tell them and then wait for the next update. If you don't inform Apple most likely you will be posting with every update from now on.

Just out of curiosity what was the app or apps using most of your battery?

Keith this is untrue, sadly: iPad users have been suffering since the iOS 13 update last fall with battery drain. My iPad went from 20 hours on a charge to 4 hours. Wiped without backup twice and the problem is unchanged. Battery health is 91% and device is not old. It's most definitely the iOS problem.