DIY 12V Battery Replacement Add'nl Info

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by Elektroingenieur, Mar 17, 2018.

  1. Prodigyplace

    Prodigyplace Senior Member

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    Autozone seems to think the (incorrect) Optima YellowTop is the correct battery.

    Let me research further. I know I posted something in the other myriad of battery threads. My OEM one is still working fine.
     
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  2. Sid Frey

    Sid Frey New Member

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    Heyy I followed Elektroingenieurs advice and got the H4-DL from autozone for 130 bucks... and it worked!! At least for now. I just drove around the block and back to autozone to get my core return money. I popped the gas lid but have no idea if thay steering calibration is done since my parking lot has turns but i did hit 22mph on the normal road at one point.. gotta reset my clock and stuff but im happy!! Im just hoping this thing lasts. Thanks everyone i am terrible with cars and I needed this win....

    Also &#%$ Toyota and their 300 dollar perma-back order battery with no recommended alternatives. ridiculous.
     
  3. David E. Edwards

    David E. Edwards Junior Member

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    After 27 months of battery use in Texas I decided to check the water in my battery. Using a wide tipped screw
    driver the caps came off without any damage. Each cell took only about 3 oz. The water was down only about a third
    from the full mark.
     
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  4. padroo

    padroo Senior Member

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    That sounds like a large amount of water for each cell for such a small battery. JMO
     
  5. Elt31987

    Elt31987 Active Member

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    Does the battery need to be disconnected when taking the top screws out and filling? Is there a max fill line?
     
  6. Elektroingenieur

    Elektroingenieur Senior Member

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    No. See pages 530–534 of the European edition of the Owner’s Manual (PDF), including the warnings on pages 533 and 534. The risk of personal injury may be one reason the same section of the U.S. edition of the Owner’s Manual (PDF), pages 598–600, doesn’t mention adding water or opening the battery at all.
    Yes, at least if it’s the original battery.
     
  7. Prodigyplace

    Prodigyplace Senior Member

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    If you look st the translucent side of the battery you can see the level.
     
  8. Mendel Leisk

    Mendel Leisk Senior Member

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    In past I've found you pretty much need to remove battery completely, get a good light behind it, to accurately judge electrolyte levels. Good opp to clean the posts/clamps.
     
  9. Elt31987

    Elt31987 Active Member

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    So I took 3/6 Caps off and I can tell that the plates are still submerged. I found it also useful to Shine a light through one side of the battery while I shake the car and check the level from the other side(caps were back in at this point.) Level looked fine.
     
    #49 Elt31987, May 18, 2019
    Last edited: May 18, 2019
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  10. William Redoubt

    William Redoubt Senior Member

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    That's why I don't go to the dealer. DIY=DIR (Do it Right)
     
  11. William Redoubt

    William Redoubt Senior Member

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    Toyota uses Interstate Battery as their manufacturer in North America. My experience in replacements is that there is no direct analouge for the Toyota unit, which is hellishly expensive at $286.00 US. However, it is warrantied for 1 to 1 replacement at no charge for 24 months, and prorated after that for 84 months. That's $3.73 per month even with sales tax. Pretty economical.
     
  12. ETP

    ETP 2019Prius(Limited),Highlander HYB Plat,B52-D,G,F,H

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    Got the 12 volt low warning message this morning at the 40 month point and 44K. Only one I could find is at Advance which I posted earlier in this thread. One dealer quoted me 175 plus install and another dealer 250 plus install.

    What happens if you don't do all that song and dance in the early part pf the thread? Like flap your fuel cap like Dumbo and tap 6 times with your 7th hand!
     
    #52 ETP, Jul 9, 2019
    Last edited: Jul 9, 2019
  13. ETP

    ETP 2019Prius(Limited),Highlander HYB Plat,B52-D,G,F,H

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    Don't see that option available.
     
  14. ETP

    ETP 2019Prius(Limited),Highlander HYB Plat,B52-D,G,F,H

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    I misread your post and I thought you said you put straight shine in it.:ROFLMAO:
     
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  15. William Redoubt

    William Redoubt Senior Member

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    The Prius battery is expensive (from Toyota) but has an 84-month warranty (2 years replacement, excess of 2 years prorated). Ask your dealer to honor the 84 month warranty. I would replace the battery with the Toyota recommended one because of the complexity of the car and the need for a lot of staying power required by the car when not running. Even if you paid the $285 retail cost of the battery you may avoid even more expensive issues caused by a not-suitable replacement. Hot weather kills batteries. In Florida you are going to be replacing the battery every 2 to 3 years.
     
  16. Elektroingenieur

    Elektroingenieur Senior Member

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    See post #6.
    I’d respectfully disagree.

    Keep in mind that Toyota’s own TrueStart replacement battery—for which the MSRP is $176.44 at this writing—is not guaranteed to be identical to the original one, and indeed has a different part number. There are several third-party LN 1 or 140R or H4 batteries, discussed in this and other threads, which meet Toyota’s stated electrical requirements and have the same case size. They are also less costly and more readily available.

    I’m not sure what “expensive issues” would arise from using one of these, provided it’s properly selected and installed. I have no objection if people find it convenient to buy spare parts at a dealer, and there are definitely parts for which the available substitutes are inferior, but I don’t think the auxiliary battery is one of them. Lead-acid batteries are a mature technology, and the relevant characteristics are defined by industry standards.
     
  17. ETP

    ETP 2019Prius(Limited),Highlander HYB Plat,B52-D,G,F,H

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    So my daughter called Advance and they said they would not swap out the battery as it needed special tools and could damage the electronics.
    She then called parts and got the $176 quote which is normal/
    Then drove to the dealer and they wanted $418 to swap out the battery/ complained to the parts guy and they adjusted the price.

    I still don't know what the out the door price was but it was significantly less than $418.
     
  18. ETP

    ETP 2019Prius(Limited),Highlander HYB Plat,B52-D,G,F,H

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    $325////argh
     
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  19. Elektroingenieur

    Elektroingenieur Senior Member

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    I imagine that’s what they said, and since they usually install batteries at no extra charge, they are free to decline, but for the benefit of future readers, it’s also completely untrue.

    Replacing the auxiliary battery on a fourth-generation Prius or Prius Prime car requires no special tools, just wrenches for the terminals and the battery clamp bolt, and ideally, a torque wrench for reassembly. (See specifications, post #1.) The work is no more likely to cause damage than on any other modern car.
    That’s the price of convenience, I suppose. NADA Data 2018 (PDF) reports that the service, parts, and body shop department, for an average light-vehicle dealership in the U.S., contributes only 12% of total sales, but almost 50% of total gross profit. Toyota’s Flat Rate Manual allows 0.2 labor hours for replacing the battery.
     
  20. bisco

    bisco cookie crumbler

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    swindlers!
     
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