battery replacement

To get an official cost you will need to contact your Apple Store Genius Bar with an appointment or call an Apple Authorized Service Provider for a quote on the phone.

You can use this information page to "Bring in for Service" to get a list of providers:

https://locate.apple.com

This is the process to replace the battery, FYI:

https://www.ifixit.com/Guide/MacBook+Air+11-Inch+Mid+2012+Battery+Replacement/12340

Replacing the Battery in your MacBook Air - Apple Inc.

https://www.apple.com/support/macbookair/en/battery_body.html

Options include mail-in service, where a box could be sent to you.

Costs are referenced in these links; may vary depending on location.

• mac Repair - Official Apple Support

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

An 'authorized Apple Service' can be contacted for this procedure, too.

Secondary information in Genius page can help for authorized service.

• Genius Bar Reservation and Apple Support Options - Apple

https://www.apple.com/retail/geniusbar/