IOS 13.4.1 and battery drain

Protect & Prolong life of your iPhone's Battery: About the battery usage on your iPhone, iPad, and iPod touch ...

Try some of these options too.

1. Avoid Screen Mirroring
2. Put on Low Power Mode
3. Put Auto Lock On (1 min):- with low power mode it will be 30 Sec
4. Put Auto Answer Off
5. Disable Push notifications for apps you do not use often
6. Enable Auto Brightness:- Settings > General > Accessibility > Display Accommodations > Auto-Brightness [Enable]
7. Manually lower brightness from Control Center
8. If you Want to watch continuous Video. Stream it on TV or a Monitor
9. Don't force close apps; Apps which are not on frontend screen are paused by the system to save energy. Apps require more energy to re-launch. Apps which are open in the background use large memory is a myth and quitting them is counterproductive
10. Location services to be allowed only while using the app
11. Set your iPhone to fetch email and calendar data from internet less frequently
12. Turning off Background App Refresh 
13. Charge before it drops below 20-30%
14. Try connecting to trusted Wifi where ever available in stead of Cellular
15. Enable Airplane mode in areas with bad cellular and wifi coverage. Your phone keeps trying for reconnection with the missing / weak network. This uses lot of energy
16. Switch off Wifi & Bluetooth while in Roaming or Not in Range
17. Enable "Wifi Assist" : Settings > Cellular or Settings > Mobile Data > Wi-Fi Assist [Enable]
18. Periodically Check your Battery Health (Settings > Battery > Battery Health)

iPhone Battery and Performance

Dear DSMJr,

You're right. Something crazy being operated inside the phone.

After iOS 13.4.1 update, battery has been draining like a waterfall and device is overheating.

Will have to wait for Apple to come with a solution.

I am having the exact same issue. I have done it all (folks that copy paste the Apple recs). I have chatted with Apple a few times who have offered running my phone in low power mode or wiping it. Neither good solutions.

I did the ipdate last night. My phone drained 16% of the battery during the night with no apps open. This problem has mever been experienced with Ios 13.3.x

I an using a Iphone 11 Pro Max. Battery isually keeps 2 days. Something is not right with Ios 13.4.1 I have never experienced a drain like this on any of my Iphones.

I have also not changed any settings. Is apple looking into this?

Hopefully, Apple is looking into issue.

Since these are your initial days of update and hence drain is no much faster. This will increase over a period of time.

In my iPhone xS, battery is drained and earpiece is also very much overheated.

Same still here, now with 13.5.1. Mail is eating 49% of the battery in the last 24 h. What helps is force quitting Mail. Normally it will not complete the update of the mailboxes and keep doing stuff, the busy wheel keeps turning, you can watch the battery going down and the phone will get warm. Force quitting and then restarting Mail will fix this and the mailboxes will update immediately.

If you have 97% battery health then you don't have any problem.

Ha! That is totally wrong. I’m at 100% battery health and have the same problem.