cmac said:
Will a jump work on a battery that won't even turn on the car interior lights or operate the magnetic locks?
Yes it should work just fine. I went out to our '07 Prius yesterday(7 degree temp!) and the battery was dead. I hooked up a 12a 120v battery charger to it and I immediately knew what happened. One of the map lights came on right away, my daughter must have left it on and apparently unlike almost all modern cars I've had, this one must not turn the interior lights after 5 or so minutes of inactivity
Anyway I just let it charge for a minute, pushed the power button and it booted up. 10 seconds or so later and the ICE started. The Prius is kind of like the Leaf in that the 12v battery is really only used to boot the car up, from there the hybrid battery starts the ICE, so no need for a large jump starter.
I agree with Lefty the jump starter you linked is a way overkill but of course would work. I personally just carry around in the back of my Leaf something like this, which I purchased after the 12v battery was having issues with my '12 Leaf.
https://www.amazon.com/TACKLIFE-T8-Car-Jump-Starter/dp/B07BGRN4TF/ref=sr_1_6?crid=2FOB5GR5Z4AUT&dchild=1&keywords=12v+battery+jump+starter&qid=1611515847&sprefix=12v+battery+jump%2Caps%2C186&sr=8-6