Battery warranty 6 month or 1 year ?

Hi aamir217,

Thanks for using Apple Support Communities. We understand you’re wondering about your iPhone battery. We’re happy to help.

To start, take a look at the article below:

iPhone Battery and Performance

If you’re interested in replacing your battery, you can check your coverage below:

Check Your Service and Support Coverage

You can find service information and pricing here:

iPhone Battery Replacement - Official Apple Support

We hope this helps.

Best regards.