Total Loss of 12V in 2010 Prius

What is the age of the current battery?

 

It may be deeper issue then just changing the battery.
Can you get another battery test at another auto parts store?

I had two issues in the past with my 2015 where I had to boost and I am still running same original batt. I suspect in my case it was either left in ready mode or door was ajar. (Happened a few years ago)

I supposed u don't have a multimeter laying around to be able to test battery for a few days?

I have read many say that multiple dead batt and jumps should be followed by serious thoughts of replacing...perhaps with a cheaper alternative?
Where is Mendel when u need him?

Battery dead in 15 min or so sounds like loose or dirty connections, bad battery or perhaps it is not charging during the previous drive?

What irrelevant codes were shown?
Any aftermarket items that are hooked up?
Any corrosion on terminals?

You still driving?
How long between this time it happened since the last?

 

1. Carry a meter in the car so the next time this happens you can measure battery voltage at the time this is going on.
2. Check the tightness of the battery cables, especially the negative cable where it bolts to the body ground.
3. Find a less expensive 12V battery. One example:

4. See if your local battery stores carry the Bosch AGM battery for Prius.
Bosch 12v Battery | PriusChat

 

welcome!

get a jump pack

 

Many places offer a 2 year no charge replacement for the battery. And then pro-rated after that.
You may just have a bad battery.
Maybe you are not driving it enough to keep it at full charge?
How LONG do you drive the car?
You could get a 4amp battery charger and charge it overnight (12hours).

Years ago I had an intermittent problem with the battery going dead, at anytime.
I was finally able to get a load tester on it and banged the battery a few times and it would go dead.
Somewhere there was a poor connection between cells or at one or both of the terminals.
I still could not convince the people at walfart that it was bad.

I finally sucked out the acid in one cell, and filled it with brake fluid. It took about 2 days, but it finally died
and would not charge. They tried to charge it, and agreed it was dead, and finally replaced the battery!

 

i wonder if a short in the combo meter could cause these symptoms

 

Check ALL fuses. One could be broken internally.
I don't remember if there is a fusable link on the battery or not.
I wouldn't bank of the battery with a hammer! Rubber or not. I just used my hand.
Something is look, or broken, obviously, just have to find it. Those are FUN!

You didn't state how long you drive the car. If you don't drive it enough, it won't keep the battery charged.
Thus the battery charger...

ORRR, something is pulling a large draw on the battery when it's off.
Because it seems to work find when it's running, right?

 

Yes, it should. Result?

 

Canadian tire has a battery for the Prius, around $200.

They probably do an electronic load test. There are prosumer level versions of those testers. I use a Solar BA5, and it looks like the current best entry level one is BA9. That said, the battery is fairly new, the dealership gives it a pass, sounds like connections or fuses.

Simple thing to do when you have an event: check the voltage (with a multimeter) at the battery posts, and then at the jump point. If you're getting 12+ volts at the posts, and nothing at the jump point...

Watching Netflix, snoozing.

 

Since I too had the dead batt a few times and both my batts are original (5+ years now),

I have one of these sitting in my amazon cart tempting me to pull the trigger.

I figure that due to it not being a HUGE complication if one of us gets stranded,
I do not need it right now, but probably soon.
( the other one of us can always come to help the other if needed with cables)

But if necessary, this little CHEAP jump pack has great reviews
jump pack
and only $30
Not sure if you have prime up there way past MAINE!

bisco mentioned first, but may be worth it instead of another tow.