First and foremost, make sure you use a 12V battery jump starter and not another Tesla or car.
Once you have an external jump starter, here’s what you need to do:
From there, you’ll want to get to a charger as soon as possible. Once your Tesla charges, your 12V battery will begin to charge. After that, you’ll want to call a Tesla mobile technician or the service center to determine whether you’ll need to replace your 12V battery.