Apple battery replacement program has ended. And if you missed out still need a new battery in your iphone and you wanna save money please watch this simple tutorial. Its very easy to do and only takes about 5-10 minutes. You can also check how good your battery is in setting under section battery. If it says battery health service then your battery is definitely bad.

Here is a link for the tools I use: https://amzn.to/3xQGStP