When my iphone is not charging should I change my battery?

With a battery health at or below 80%, it is time for a new battery. Get an appointment at an Apple Store or Apple authorized service center to get your battery replaced.

What does your phone tell you about battery health?

Time to replace that battery.

You battery life is ended. You need to get it replaced. Not reccomended for user service, you should go to an authorised apple repair shop.