Prius just died after I parked- Good battery

when it died again, was it totally dead like the first time? did a jump work again? how old is the good 12v?

 

Those parts stores do NOT understand about the 12v Prius battery.
It needs to read about 12.5v to be "good"
If you have a 4 amp or less battery charger, you could charge it for 6 hours or so.
How old it the 12v battery? Do you drive a lot of highway miles, or just city driving?

Do you have a VOM? Check the battery at the battery. And next time it dies, check it.
I'd bet it will be low.

 

Volt Ohm Meter
That's plenty good.
Sounds like a loose wire or something overheating...

 

any movement in the inverter reservoir?

 

Okay, maybe check for a loose connection. It's happened before.
Check both electrical and hoses...

 

maybe it went into some type of protection mode when you hit the a/c because of the heat

no trouble lights?

 

Not sure if this applies to Gen3 Prius, but if this were a Gen2 this is what I'd tell you:

You'll likely be able to predict when this is going to happen again by watching the speedometer screen. When you turn the car off if it happens again the speedometer screen will go dark all at once. But if car is working normally it will turn off portions of the screen in a sequence with that last part to go out being the gear shift indicator.

As far as we can tell this problem is caused by bad connections with all the electric circuits on top of the 12volt battery. So all you need to do to fix it is clean inspect all that gear and put it back together.

 

Is it blowing ANY air at all ?

This sounds like an intermittent problem with the 12 V system.
Either the battery itself OR with one of the main battery cables.
The far end of the negative battery cable where it attaches to the
body or frame is often a problem.
But it could be a loose or corroded connection right at one of the battery posts.

 

what year and how many miles?

 

maybe a bad connection, are they jumping it under the hood, or at the battery?

 

If you have an battery other than Optima or Toyota OEM.... Suspect the battery. I have had a bad experience of intermittent starts with a 2 year old AAA battery. Go with OEM Toyota or Optima Yellow top.

 

That HUGE bias you have against other brands of batteries is totally unjustified.

As a matter of fact, there have been a lot of reports of bad experiences with Optimas too.

 

See post #3....

The reason it does is because they do not charge them. They sit and get weak.
Which is not good. These batteries are different than the lead acis batteries.
So it's best to give they a charge when you buy it.
And unless you drive for a few hours after installing it, it won't be charged enough.

You should have pushed them more to honor the warranty because there is a sticker on
the battery, or should be. Sadly, most people do not keep the paperwork for the battery
when the buy it. You should just keep it in the glove box. Sometimes there is a plastic
sticker bag on the side of the battery that the put the paperwork in.

At least your problem is resolved.