My 2 new Toyotas - 2016 RAV4 & 2017 Prius v do the same thing over a couple of weeks.

The myriad of on board computers are continually draining their batteries when not in use. No problem if they are daily drivers; however, let them sit for 3 weeks (like I do often) & the batteries become weak. Both are now serviced by Battery Tenders like my motorcycle.

I suspect that your AIRs may doing the same thing...

TAM