AirPod Battery Replacement for Model A2031 Version 6F21

You can get an estimate on battery replacement for your AirPods 2 here:

AirPods Replacement, Repair, and Service - Apple Support

No because airpods fitting not same after changing,

Techissues1990 wrote:

No because airpods fitting not same after changing,

This is why it is important to have Apple do the replacement, not someone else.

Yes but apple can't do that