Need new AGM Battery 24R vs. 34R

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by toyolover, Mar 1, 2021.

  1. toyolover

    toyolover Member

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    I need to replace the 12V AGM battery very soon. I am on the second battery which is the Optima Yellow Top. It has 7 years of use without any issue so I am quite happy to go with another Optima. Toyota dealer is selling their own OEM at CAD$350 which is pretty much the same as the Optima. The Canadian Tires' Eliminator is $250. Costco doesn't have 24R but a 34R Energizer at CAD$220 only.
    I called Odyssey Battery and they say I can use the 34R instead. The polarity position and dimension of the 34R seems to fit.

    Can anyone confirm the 34R can be a substitute for 24R for my 2010 G3 Prius?
     
  2. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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    I’m probably going with the Canadian Tire battery next time around. About the same specs as the original battery, 100% compatible, “decent” price.
     
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  3. rjparker

    rjparker Senior Member

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    You really have to compare the S46B24R number versus 34R or 24R. When I look up 34R agm batteries the polarity seems to be opposite of a S46B24R.

    Often alternate batteries don't have the correct terminal post diameter either. Without the right diameter the cables won't fit. The vent hole is not a standard on many batteries as well.

    Battery dimensions
    Width: 5 1/4"
    Length: 9 3/8"
    Height: 8 15/16"

    Positive Terminal Location: Left Top

    Spec: S46B24R GS YUASA

    D663B958-7790-48CC-9241-8D221541EA64.jpeg
     
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  4. toyolover

    toyolover Member

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    Thanks for your reply. I already checked the website pictures. Their polarity positions are the same. The 34R has the same width and depth but lower in height by 1/2 inch. The 34R CCA and Ah is also higher than the 24R even though higher CCA it is not required as it is used to power up the computer rather than to turn the starter motor. I might have to put a small plywood at the bottom so the battery bracket can hold it securely in place. I am only worry if the 34R would bring any adverse effects. So I am hoping if anyone here is using 34R and can confirm this.
     
  5. toyolover

    toyolover Member

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    Thanks. I read from your past replies about the brand recommendations. Do you think the Eliminator battery will last 5 years as they claim in the warranty? Toronto weather is much harsher than Vancouver, especially when my car is parked outside on the driveway. Optima Yellow Top has only 3 year warranty but I am very happy that it has reached 7 years.
     
  6. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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    I suspect they're all pretty close in reliability. Differences in lifespan are due to amount/frequency you drive the car, use of a smart battery maintainer* if the car's idle for protracted periods, and avoiding "mishaps", doors left ajar, headlights on, that sort of thing.

    * I've currently got a Optiima Yellow Top too, it'll be 6 years old next fall, will probably replace it at that time, been a good run.
     
  7. toyolover

    toyolover Member

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    Thanks for everyone's input. After more searches done in the past two days, I now tend to settle on Costco's Energizer 34. It holds more juice than 24 (even though I do not need the extra to power up the computer), identical in W and D but lower in height, costs less than the Yellow Top and has longer warranty in paper. Costco gives me more confidence in case of any future issue. It delivers to my front door too.
    Are there any reason not switching from 24R to the 34?
     
  8. Grit

    Grit Senior Member

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    if you went with the Costco brand battery over the Toyota oem battery then your screen name shouldn’t be what it is currently :LOL:
     
    #8 Grit, Mar 2, 2021
    Last edited: Mar 2, 2021
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  9. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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  10. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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  11. Grit

    Grit Senior Member

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    “Costco gives me more confidence in case of any future issue” - op
     
  12. toyolover

    toyolover Member

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    Haha. You got me.
     
  13. toyolover

    toyolover Member

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    Yeah, you get a good point. If the battery well does not accommodate the larger W and L, I have only two choices left. I will check it out tomorrow and give an update here.
    Thanks again.
     
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  14. toyolover

    toyolover Member

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    Final update on my battery search:
    The Prius battery compartment is so tight in space. It is designed to house only one single battery size, the 24R. Type 34 is slightly larger and the wielded battery bracket opening is too small to accept the 34. 24F has reverse polarity which the cables are too short to cross-reach the terminals. No other size battery would fit. 24R is the only choice. Only Toyota OEM, Optima and Eliminator (by Canadian Tires) makes 24R. There may be more choices in US but few in Canadian market. I will stay with the Yellow Top. Again, thanks for everyone's input and help.
     
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  15. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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    I got my yellow top from Saskbattery last time; they ship free, and if I’m not mistaken no sales tax, or maybe just GST?? Bottom row middle item here:

    OPTIMA BATTERY SASKBATTERY.COM

    It’s got 450 Cold Cranking Amps but lowish 38 amp hours, fwiw. Myself I’ll give Canada Tire’s option a try, might be this fall, will be 6 years for my yellow top.
     
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  16. toyolover

    toyolover Member

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    Thanks so much for your valuable knowledge and inputs. It really helps a lot. The next thing I will look into, after replacing the 12V battery, is the Dr. Prius app. I saw your comments on that too. May need to consult you again later. It is wonderful to have Priuschat members like yourself.
     
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  17. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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    I’m just passing along stuff I learned here, but thanks. :)
     
  18. Siward

    Siward Member

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    I am running close to my 5th year on my Motoromaster eliminator AGM battery that I bought on Nov 2016 from Canadian Tire. I stored my Prius for 6 months and then drove it only once per week for the last year due to COVID-19. The battery still runs.
    Canadian Tire Eliminator Ultra AGM Battery for Prius (w/Pics) | PriusChat

    I also live in Toronto like you. My car is kept in a garage when not driven.
     
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  19. toyolover

    toyolover Member

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    Thank you very much for your info. I will definitely consider the Eliminator battery because Optima has not given me any of their Toronto authorized dealer yet. They said if I buy it from online retailers, when it comes to warranty service, I'd need to take it back to where I made the purchase. So out of Toronto sellers are a deterring factor for me now.
     
  20. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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    FWIW I saw Optiima Yellow Tops on the shelf at Canadian Tire, a few years back. Still, and hey I’ve got one: they’re lower amp hours than the OEM, whereas the CT badged Absorbent Glass Mat option matches Toyota spec.
     
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