My iPhone 11 pro
I bought this phone before a year and a half and now my battery is 80% and when I charge my phone it ends so fast , why is that happening
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Hi fadel227,
Welcome to the Apple Community.
We are all Apple users, like yourself, in this community ... doing what we can to help each other troubleshoot.
You could always take your iPhone to an Apple store, and have it checked out.
If you need to visit an Apple Store,
a Genius Bar reservation is recommended:
Online: https://www.apple.com/retail/geniusbar/.
or
use the iPhone app: https://itunes.apple.com/us/app/apple-support/id1130498044?mt=8
OR
Apple Support have articles online with lots of info. on iPhone battery.
About the battery and performance of iPhone 11 and later
https://support.apple.com/en-us/HT210557
Monitor the iPhone battery level:
https://support.apple.com/en-au/guide/iphone/iph4747a74a9/ios
About charging the battery
Eg: You can scroll to "Turn on Low Power Mode"
https://support.apple.com/en-au/guide/iphone/iph63eecc618/ios
More About Optimized Battery Charging on your iPhone
https://support.apple.com/en-us/HT210512
Tips about maximizing battery life and lifespan:
https://www.apple.com/batteries/maximizing-performance/
All the best :-)