How does it cost to change the battery on a Apple Watch

Apple doesn't actually replace the battery in Apple Watch. Instead for the cost of battery service, you turn in or send in your watch and you get a refurbished, but like new watch in return with a new battery.

Enter your information in this link to see the costs --> Apple Watch Service & Repair - Apple Support

They make it feasible impossible to replace the battery. Time for a new watch! Sorry