Thanks.

If it fails to restart after the third day immediately after being shut off, the battery does not appear to be getting, holding a charge or not connecting its power to the car.

For it to STAY running after a jump start, it strongly infers that the charging system is indeed working. I'm inclined to believe your battery is becoming isolated from the vehicle's electrical system on those times when it won't restart.

This could be something as simple as a bad cable or cable connection at the battery or at the jump start posts on the passenger side underhood. To be sure, a voltage test would need to be done during a time when it's not able to start itself to see where the voltage went.

Start at the battery, checking the centers of the battery posts for power. Turn headlights on to load the system and start moving the test leads outward until a voltage drop is found, either on the positive or negative side of the electrical system. It MAY simply be a bad battery... internal breaks are possible between individual cell connectors but rare in new units... but that's something that can only be found by testing.

If you have a voltmeter (preferred) or test light, I'd be happy to help you with this once it breaks down again and you have time.

Ed

I have to disagree... something is NOT good, it was just missed. I'm afraid I have no better advice than to catch it in the act. Testing is what you need and all I can do is to guess at this point. Remember that I can help with testing if you can arrange a date with a digital multimeter... It won't be that complicated.

Ed