IPhone X need new battery. Is it still on warranty

Hey there satish244, thanks for reaching out on the Apple Communities!

I'm sorry that you need a replacement battery for your iPhone X, but I will provide some resources to help today.

You can contact Apple Support via phone at (800) APL–CARE (800–275–2273) or you can use the Get Support section of Apple.com located at https://getsupport.apple.com/

An Apple advisor will be able to tell you the specifics about your device and its warranty status as well as run a diagnostic test to see what the health of your battery is.

Thanks again for reaching out and I hope this information is helpful!

Going to be equivalent of USD50

https://support.apple.com/iphone/repair/service

batteries are not warranty items they are consumables