“AAA charging trucks can provide a 15 mile charge.”
There are several companies that offer portable EV chargers to roadside Tow services, including to AAA. They can also be carried in an EV as an emergency charger. Here is one:
“Blink Introduces Portable, Mobile EV Charger for Roadside Use”
https://www.caranddriver.com/news/a32069151/blink-roadside-mobile-charger/