Jumper cables? Nah....there is a newer better solution.
Thanks for the advice to those that offered it.
I decided to give this one a try:
Here we go.
This is compact enough to sit almost anywhere and not weigh 50 lbs.
Looks simple.
If all fails, there are directions.
Charging port on one end, jumper cable ports on the other.
Common electrical ports.
Simple charger unit.
It was at 76% when I opened the box, within 2 minutes...
I stepped away for about 5 minutes and it was at 100%. I'll test it soon and report back.