SHOCKING MACBOOK

While I was curious, sought to learn if there were means toward

disconnecting battery from logic board ~ as a last-ditch effort to

forgo an internal short, that could be fire hazard..

Appears efforts to even go there ~ may cause void of warranty.

The 2018 model is similar enough to 2019 MB/Air, to learn of a

discouraging detail; where the power-out from battery attaches

to macbook, seems like a strenuous exercise. Not an end-user

serviced design, for sure; unless one has Apple tech experience!

Looked into a few online guides and DIY video, most of those

are for older model MB/Air with different battery connections;

and your model alleges to have original warranty. To tamper,

even to negate dangerous situation, may terminate warranty.

I suggest if you happen to have somewhat secure place with

concrete structure; such as storage area or unoccupied section

of garage.. MacBook Air could be set on non-flammable surface

and hope for the best; and Battery would eventually lose power.

I spent some hours reading online, and since these later models

have few/no end user parts to replace; there's 'much less' info.

You have 14 days from the delivery date to return it for a refund.

Thank you for participating in the Apple Support Communities.

I want to make sure you reach the right team for help with your MacBook Air. I recommend that you contact Apple Support directly. Depending on your region, you may be able to reach them here: Contact Apple Support

You may choose to try and contact Apple directly, steps beyond your

regional, local, or country authorized service.

Several links to Apple exist; some offer different features; depending

on your location, some of those offer mail service for repair direct to

authorized Apple service. In those cases, they send a box; you put the

portable mac inside, and ship it back.

A few of several links I've bookmarked:

• Genius Bar Reservation and Apple Support Options - Apple

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

Above has sections with links for 'hardware' and 'software' help issues.

• Mac Repair - Official Apple Support

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

Global:

• Apple - Find Locations - Location Selector

https://locate.apple.com/findlocations

Local:

• Apple - Find Locations

https://locate.apple.com/

First link above suggests options including mail/shipping for service.

This may be conditional; limitations may exist. I'd look into this, there.

(noticed two posts from you -chose to reply to older- where info exists)