12-Volt Battery Poll

Im sure theres studies on this somewhere (on here?) but i'd put my money down that the 1-3 gen, with the 12v battery in the trunk, last longer, than the 4th gen under the hood.

 

Under the bonnet of a PRIUS is never all that hot - I've opened it after a long Motorway run - compared with some previous cars which you could nearly get heatstroke from the heat radiating from under their bonnet.

But yes, in the boot would be cooler.

 

I got mine replaced under warranty at about 3.5 years old. It ran flat a few times over various lockdowns, then after a -16C day in February it couldn't keep a "full" charge for more than a day.

 

I bought my 2016 Prius Four Touring as a Toyota Certified Pre-Owned vehicle. I drive it almost every day. In April 2021 my 12V battery died. Assuming it was the original battery it lasted 4 years. My dad has owned Prius's since the first Gen. and has only had to change the 12 V at the 10 year mark. This Wednesday the car would not start again... the 12V is still under warranty. The car was parked at 8:00 pm Tuesday night and I attempted to drive to work Wednesday at 6:45 AM, so in less than 12 hours the battery was dead. The dealership says the battery needed a full charge and that they have no idea how this would happen at only 4 mos. and the only advise they can give me to prevent it from happening again is to be sure I drive it every day... So apparently I'm not allowed to sleep... It seems from these discussions that Toyota has designed a parasitic draw on the battery, knows this and has no intention of correcting this design flaw.

 

Your particular case of battery failure is not a parasitic draw design flaw of the car.

 

Of course it does. But that wasn't the discussion.

Simply being exposed to cold does NOT shorten a batteries life span........unless you are near the end to start with.

 

And it seems that your analysis of the situation is flawed.
Even new batteries go bad. Maybe it never was fully charged to start with.
Maybe YOU have a device running that is causing a "parasitic draw".
A design flaw is WAY down near the bottom of the list........since there are literally millions of users who aren't having that problem.
Even the examples that you provided don't support that conclusion.

 

'08 replaced 12v in 2018, so 10 years.

I should have replaced it a year earlier.

 

3 years for the piece of crap factory OEM 12v. Over mileage limit of 36k so I payed like $210 installed at the dealer. However the new battery has a much higher CCA capacity (like 450) compared to the tiny capacity (210 or something like that) of the original that came from Japan. In another note I had good luck with the toyota batteries in my other vehicles so I believe this one should hopefully last for the next 6+ years easily.

 

This was original

 

To a cold winter climate user, what good is a battery that no longer has enough cold capacity to meet the engine starting needs of his cold winters, but has several more years of life left for a milder climate somewhere else? For his cold winter needs, it is just as good as dead.

And yes, this most definitely is part of this thread's discussion.

 

Different battery so deleted...

 

Oops. Didn't realize. Deleting my prior post...

moto g(7) power ?

 

Replaced at about 4 years in - at 140,000 mile service. Didn't have an issue with it, but dealer suggested replacing based on testing it.

 

You are trying to put words into my mouth that I did not say........again.
Somebody said that cold would reduce the life of a battery.
I said that is NOT true.......and it is not.
I never said that one near the end of it's life wold not be a problem in the cold.
DID NOT.
Stop twisting the facts just so you can throw crap at me.......again.

 

The previous owner replaced my 2017 at a dealer because of a dead cell at 3 years. It was a corporate vehicle with only 22,500 miles when I got it in March of this year. So I'm assuming it wasn't driven much because of covid. I don't drive much either so I keep a battery tender on it so I can, hopefully, beat the previous one's time.

 

I'm at 7 years with a replacement from O'Reilly's in Colorado. AAA tested it at an event a couple of years ago, said it was in great shape. I carry a compact jump starter in case.

 

9 yrs av 4 Prius owned. 16 friends w same car, similar results