Why does the iPhone 11 battery age so fast

Hello german284,

Thank you for using Apple Support Communities.

We understand that you are concerned about the battery condition and life for your iPhone. You can take a look at the following support article that addresses battery and performance questions for the iPhone and provides suggestions to maximize performance.

iPhone Battery and Performance - Apple Support

Best regards.

You can contact your local Apple Store for free battery replacement if your battery health drops to 80% and if your device is under the age 2 and under 500 cycle counts. To check your cycle count, you have to install iTools to your PC.

If it drops below 80% in less than 500 cycle counts and of course if your device still has a guarantee, they will replace your battery for FREE. Just contact your local Apple Store anyway. They might replace it for free even if your battery health is above 80%. Just tell this same issue to them.

You will pay for the replacement battery.