I use IPhone SE with iOS 11.4 , and my phone suddenly got shut down and after turning it on i got msg "This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power. Performance management has been applied to help prevent this from happening again."
What happen to my phone? Is this msg about to worry ?
iPhone SE, iOS 11.4
Have a look under Settings/Battery and see what the health is, it may be your battery might now be in need of exchange, you should see a percentage figure, if 80% or lower you need to speak to Apple.
https://www.macworld.co.uk/how-to/iphone/iphone-battery-need-replaced-3669402/
Battery Health Maximum Capacity is 98%
With the battery showing 98% then health shouldn't have been the reason, if you had just updated iOS (within the last 24hrs) then I suppose it's possible you could have pushed passed it's limits momentarily by running a particular "heavy" app while the system was still sorting itself out following the update.
It's something I would suggest needs monitoring, watch how your device performs over the next week or so and see if it happens again, also try to gauge battery drain time, is it lasting as long for example. But first you may have to go back into battery settings because leaving on any power management could just be masking the issue (not sure if it can be turned off or not so have a look around and see what you find).
If the issue does reoccur then a call to Apple would be the next move.
about suddenly shut down
