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OEM vs Optima 12V aux battery

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by D Dog, May 1, 2015.

  1. D Dog

    D Dog New Member

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    Hi

    this is my first post up here (I have been reading it incognito for a while). I have a 2006 Prius with 150k km on the clock with what I presume is still original battery. I performed the test described here (after I got some unusual light show with brake warning lights and transmission error after I tried to do a battery test under load). What I get back is 9.5V without load which is far from ideal (the car still starts ok, for now).

    Dilemma I am facing is whether to buy Optima (only reasonable option is Elearnaid where it would be ~$225 including postage to New Zealand but as such with limited warranty). I tried to contact local Optima importer but looks like Toyota holds a monopoly here and they are not allowed to import these batteries for Prii. Second option is a dealer who wants ~$250 for OEM battery only or $300 fitted. I got the impression Optima is a better choice but I am worried about warranty since sending it back to the US is not really the option if it fails.

    What would you choose? I still have the choice, if it fails completely will need to go with OEM.

    Thanks
     
  2. jdenenberg

    jdenenberg EE Professor

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    Is the Exide AGM battery imported to New Zealand?

    JeffD
     
  3. nssdiver

    nssdiver Me digging' life

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    Dog,
    You will, frankly, be rolling the dice on this purchase.

    Optimas reliability has tanked since they moved manufacturing to Mexico 4-5 years ago. So much so that I have had two different auto parts salesmen try and talk me out of buying one.

    From what I've read, the OEM battery is reliable but not as long lasting.

    FWIW - I put an adapted Optima in my '07 Prius from eLearnAide when my OEM pooped out @ 4 yrs. It runs 12.2 - 12.3V after having been completely flattened once. (Right after I installed it!) Brought it back to life with a pulse charger and it's been good for 3.5 yrs since.

    I'm sure others will chime in with their opinions.
     
  4. bisco

    bisco cookie crumbler

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    welcome! oem, they've improved the warranty (at least here) and you really can't complain, getting 9 years out of yours. all the best!(y)
     
  5. Stevewoods

    Stevewoods Senior Member

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    I will vote with Toyota for a couple of reasons. Everything will fit as it should. And, the $50 being charged for install is actually reasonable (for a dealership...). Of course you could install yourself.

    Don't know about your land, but in the USA, the Toyota TrueStart warranty features free replacement and free towing/roadservice and free installation if the Dealer installs. Free installation only if you install -- check those, I may have it wrong even for the USA.

    Also, don't know about your area, but lots of Toyota dealer web sites have parts/service coupons that can reduce costs by 10-20 percent, which helps.

    The Optima, well, read the recent reviews on here. I had one in my 1997 Nissan and swore I would never use another brand, but times have changed and with recent reviews....well....

    My Original Toyota battery that "came in the car," lasted from 2008 through 2014, which isn't bad considering wifey only drives some 6-9 miles per day and sometimes not that much (if at all). The "average" life according to Johnson Controls, of all 12v batteries in all cars is five years AFAIR....
     
    #5 Stevewoods, May 1, 2015
    Last edited: May 1, 2015
  6. exstudent

    exstudent Senior Member

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    For the small $25 difference, best to pay the stealership, and DIY.
    *Don't know if you'd be able to ship a defective Optima back to elearnaid (in California).
    *If able to ship it back for a possible warranty claim, shipping will probably be way more than $25.
    *You will be w/o a battery for weeks.​

    As others have mentioned, browse the Toyota dealership webpages in NZ, for possible percent off discount parts coupon.
    See if your roadside assistance company (ie AAA in the USA), has discounted part rates for its members, at participating dealerships.

    See if your Autoparts stores carry Prius equivalent batteries: Bosch (S6535B)-45Amp/hr, Exide (FP-AGM51JIS)-45Amp/hr, or others.

    If your Prius has SKS (Smart Key System), you really want the dealer battery, or the Bosch/Exide listed above. SKS cars come standard w/ the 45Amp/hr battery, b/c of the larger continual drain on the 12V battery from the SKS, unless it is turned off. Optima Yellow top is a 38Amp/hr battery. If you drive infrequently or not long enough, the Optima has a greater chance of being discharged b/c you are starting at a deficit of 7Amp/hr (45 vs 38).

    Consider investing in an AGM compatible battery charger like the Ctek (MUS 4.3), Schumacher (SSC-1500A-CA), or others. Some here seem to recharge their batteries occasionally, as preventative maintenance. A fully charged battery has a longer life span than a battery that is in a perpetual discharged state. Its a useful tool to have, b/c you may accidently leave a dome light on, trunk light on, or a door ajar, discharging the 12V battery.
     
  7. rifis

    rifis Junior Member

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  8. dolj

    dolj Senior Member

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    Don't buy an Optima and don't import a battery yourself from overseas. The cost will be prohibitive and if you need to call on the warranty, more than likely the cost will outweigh the benefits.

    I'm not sure how the situation has come about, but it seems no battery supplier in NZ sells an AGM alternative for the Prius, including Exide.

    Which part of the country are you at?

    There are alternatives, but it depends on how much effort you want to put in. The easiest route is to buy from Toyota. Not sure what price difference you will get by shopping around, as I don't think they sell too many of the Prius batteries to make it very competitive. The joys of living in a small country. One good thing is that Toyota only stock the larger 45 aH battery, so regardless of whether your car has SKS or not it has the same 45 aH battery.

    I'm not sure of your test methodology, but your battery is so far from ideal that it is in need of immediate replacement. You maybe able to buy yourself time by putting it on charge, but, I wouldn't hold my breath. I doubt whether 9.5 V is an accurate reading, because if it were it would not boot the car to allow the relays to click on. The threshold is somewhere around the 10.5 V mark.
     
  9. D Dog

    D Dog New Member

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    Thanks guys, You talked me out of Optima and will go with OEM.

    I have what they call here "No worries" Full mechanical warranty with Toyota NZ but auxiliary battery seems to be excluded and is on pay it yourself list.

    I only have 2 stealership options in Christchurch, will call the second one to compare prices but I don't expect significant difference, I am reluctant to call to Rangiora where they sold me the car since they 'forgot' to mention the car is still under warranty and only tried to sell me a new one for over a $1k. The car came with automatic daylights option and I took this off immediately since it was only draining the battery for no reason (lights came on as soon as you pressed Power).

    9.5V is what display is showing after entering Maintenance mode when Power is only pressed once, I usually get transmission error if push Power once more and lately the red triangle has been showing more and more often when I get the car started. it is getting colder and my usual drive would be about 30kms. Time for a replacement since I don't wan t to get stuck at 5am in the morning on a frosty night. Funny thing is I just serviced the car at the dealership and supposedly they tested the battery (at least it was on the invoice I got). But this is no surprise since I had to go back after they changed the water pump as it wasn't aired properly. I guess what I am trying to tell is I don't trust them.
     
  10. bisco

    bisco cookie crumbler

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    can't blame you for that, but i can only say that $200. isn't a bad price for oem, relatively speaking, and $50. is excellent for labour, should you choose not to diy it.
     
  11. D Dog

    D Dog New Member

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    Just to add to above, identical price for OEM with second dealer NZ$338 (US$250) but funny enough they offered me a conventional Century battery for NZ$140 :confused:. Yeah $50 is not bad when they charge $75 to replace cabin filter but it wouldn't take me 2hrs which is what I had to spend at work to pay for it ;)
     
  12. bisco

    bisco cookie crumbler

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    well, there's a recent thread from another aussie, who was charged $1,300. to change the water pump. but they gave him a free car wash to go with it. don't feel too bad.:p