battery MacBook 2013

Perhaps arrange to have MacBook inspected, an estimate on service;

and have the battery replaced, may resolve the tired battery status.

• Apple Repair and Repair Status Check - Apple Support

https://support.apple.com/repair

An older MacBook (Air/Pro/etc) may require the services of an AASP

or apple authorized service provider; when an Apple Store may not

stock the replacements for too old a device. The link should suffice.

Run the Apple Diagnostics to see if any hardware issues are detected.

Unfortunately with macOS 10.15+ macOS now makes determining the true battery condition extremely difficult since there are now only two options "Normal" or "Service Recommended" where the latter can mean the capacity has dropped below 80% of the design capacity or macOS has detected a hardware issue with the battery. Before macOS 10.15 a hardware issue would have been identified as "Service Battery". But now you must either rely on the Apple Diagnostics to tell you if a hardware fault exists with the battery or perhaps a third party app will show the older style condition status (not sure if this is possible but I think I've seen third party apps do this). Coconut Battery is popular and will show you the current capacity compared to the original Design Capacity, but I don't know if it will show the "true" condition with macOS 10.15+.

If there is no hardware fault with the battery, then ignore the condition until the battery doesn't give you a long enough run-time.

Unfortunately a 2013 MBAir is now "Obsolete" I think so Apple won't replace it (check with an Apple Authorized Service Provider to be sure). Otherwise you will need to use a third party battery, but the quality of third party Lithium-ion batteries is extremely poor even when purchased from a reputable vendor such as OWC or iFixIt.