Why when i updated my iphone 6s plus to ios 11 my phone decharged very soon

fredy1361,

Go to Settings > Battery and scroll down to BATTERY USAGE to see the apps that are consuming your battery. If any of the apps have unusually high usage they can be shut down (double tap the Home button, scroll left or right to find the app, then swipe up to shut it down).

As time goes by you should be able focus on the problem apps. Usually it is a rogue app constantly running in the background. You should then be able adjust the settings for the problem app to solve your problem.

Let us know how it goes.

Hi

Go to apps store download Battery life it will test your battery condition.

If your iPhone is over 2 years old it will need a new battery.

Make an appointment at Apple store.

Or go to Support.apple.com

Cheers

Brian 🇬-1F1E7;