Hi again,
Let’s see if we can find some loose strings hanging out someplace!

Ok, so you did change over to a newer battery.
That explains why my first thoughts were too easy!
It’s Ok, you had painted it covered, in your mind.
Now we have to add some more colors to the mixture!

Ok, let’s say we rule out the battery and it stays good for the whole time until the Mystery get unveiled. It’s then it starts to run poorly.
Symptoms are it slowly loses power ... until it completely “putters” out.

You then say, after a total shut down it starts right back up, but only, when there is another battery used to bring it back to life!
We know that it’s leading to something happening with a steady higher rate of current, going into the various systems.

Have you cleaned and oiled all the fuses in the door hinge panel.
Check the fuses for cracked tips and green stuff around the small holes of the metal-clip fingers.
Those little green Gremlins do hide there!
I recommend servicing them every couple years, if your shoes and mats get wet from rain and especially, if snow plops there regularly.

So, it starts fine during all the other times.
Jeez, that’s not nice to label this as a pure Intermittent! This will definitely antagonize one’s mind!

I gather there are No “slow cranking moments” at anytime prior too or before the power starts dropping off to a putter?
I also mean, it just doesn’t shut down or turn off like a switch does it!

How old is the Crankshaft Position Sensor?
It would affect the power issue, if the signal gets weak and then produces a random cylinder misfire for a 25% loss in power.
Does it always fail only on a nicely warmed up to temperature engine?
That item is located where it gets hot back behind the head.
Look to see if the cable from it is frayed or dried out looking with several cracks.

Does it ever fail to start and it then runs the battery low enough to require the jump?
What do you think is the reason for doing the jumping it thing, in your mind?
Do you carry the other used battery around with you, for the jump?
I think, it would be very inconvenient to look for a donee car or be calling and waiting for AAA each time!

I will assume that rain is not a factor, but you haven’t said if there are any certain environmental conditions each time?
Have you noticed any pattern like that to warrant mentioning here?
A weak ignition system is usually a good place or the first item to keep squared away, in trouble shooting most symptoms.
Any idea how long it’s has been?

Is the fuel in the tank always at the same level or is it reading low each time with the event?
There is a symptomatic pattern of a bad in-tank fuel pump.
It may faltering each time the tank is near empty or below a half tank and you go up a hill.
A dirty sock screen or broken rubber connecting hose are possible.

Only trouble is, it doesn’t explain why the battery jump helps to correct that or the instant restart until the battery is added unless it’s a corroded ground near the tank or to the main pump.

Try to listen and notice any tiny things to tell us.
It all helps to picture the car we are thinking about.

Phil