Auxilliary Battery Life: Please POST if you have replaced yours

Discussion in 'Gen 2 Prius Main Forum' started by HighBreed, Dec 8, 2007.

  1. DaveShepherd

    DaveShepherd Member

    Joined:
    Nov 13, 2004
    140
    9
    0
    Location:
    Washington, DC (VA Suburbs)
    Vehicle:
    2010 Prius
    Model:
    III
    Thanks for this thread; it answers my question.

    (And I quite agree that 96 posts do not seem to represent a "newbie." I've been on PriusChat on and off for 6 years, but I only have 139 posts.)

    My 2005 has been sitting around on the street undriven for 2-3 weeks. I'm trying to sell it (since it's my "extra" Prius). Tried to start it this morning and nothing would respond: no SKS, no remote unlock, no start.

    I'm quite sure I need to replace the 12V, and I'll use the info in this thread to buy a battery this week.

    I'll jump-start it to get it in for its 90K service, and I'll replace the battery, and then I'll hope to sell it to pay off the note on my 2010 GenIII.

    Thanks again.
     
  2. Beretta27

    Beretta27 New Member

    Joined:
    Jun 30, 2010
    3
    0
    0
    Location:
    England
    Vehicle:
    2009 Prius
    Model:
    N/A
    Parked my 2009 eighteen month old Prius T-Spirit at Heathrow, went away for two weeks, came back and the whole lot was dead, could not use the remote to get in the car, so opened up with the key, phoned the AA and sat and waited.
    They started it, stating that the rear battery was totally dead, took it to my local dealer who replaced it, obviously under warranty, adding that there were two dead cells in the battery, and that they had a lot of them failing recently on new'ish cars.
    Great advert for Toyota....."NOT".
     
  3. Edifier1

    Edifier1 New Member

    Joined:
    May 18, 2012
    1
    0
    0
    Location:
    West, TX
    Vehicle:
    2002 Prius
    Model:
    ----USA----
    Yesterday I jumped in the car to make a quick trip to the grocery store and it was dead. No dome light, no displays, nada.
    After a decent amount of research and learning some interesting things about this car. I thought I'd share that my factory battery definitely "beat the odds". Now, I'm on to find a replacement, as I've been trickle charging the aux. battery for about 4.5hrs and have minimal charge level improvement. I'll let ya'll know what I replaced with -- it dang sure won't be from the dealer....$212 battery & $50 adapter tray (plus labor, since they won't just sell me the parts! lol)
     
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    86,343
    38,230
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    just replaced my 04 yesterday, no complaints whatsoever.
     
  5. jadziasman

    jadziasman Prius owner emeritus

    Joined:
    Jan 17, 2011
    1,355
    470
    0
    Location:
    District 6
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    Do you mean the aux battery or the entire Prius?

    Either way, you did good.
     
  6. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    86,343
    38,230
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    just the 12v.:D
     
  7. lamebums

    lamebums Member

    Joined:
    Jun 26, 2008
    101
    29
    0
    Location:
    Southern Ohio
    Vehicle:
    2007 Prius
    Model:
    N/A
    Hi all--

    As far as I know I had the original 12V battery in my 2007, but I bought it just a few months ago so no way to be truly sure. It was reading as low as 9.9 volts per the ScanGauge and I believe it was costing me 5+ MPG as well. Replaced it a couple days ago with an Optima YellowTop from Advance Auto Parts (there's a thread in the main forum where you can get one for $150 shipped). Runs like a champ now and I was averaging 67 MPG before I started blasting the aircon :)
     
  8. FBear

    FBear Senior Member

    Joined:
    Nov 1, 2004
    352
    21
    0
    Location:
    Maplewood, NJ
    Vehicle:
    2015 Prius v wagon
    Model:
    Four
    My 2005 ( in service Oct 2004) still has the original Aux. battery. I just had it tested, including a stress test and it passed with flying colors.
     
  9. GuamKelly

    GuamKelly Member

    Joined:
    Sep 17, 2010
    242
    44
    0
    Location:
    Ipan, Guam
    Vehicle:
    2008 Prius
    Model:
    III
    Replaced mine with a yellowtop after three years. I could probably have got another tear or two out of the factory battery, but maybe not. Given that roughly half the failures of ANYTHING I see here are are failures of the 12v battery, I consider it a very inexpensive investment in peace of mind.
     
  10. jdharkness

    jdharkness New Member

    Joined:
    Feb 7, 2011
    1
    0
    0
    Location:
    US
    Vehicle:
    2006 Prius
    Model:
    II
    I had mine replaced today. 2006 Prius 3 with about 80,000 miles. $297 for dealer to do it.
     
  11. captnslur

    captnslur Junior Member

    Joined:
    Feb 3, 2004
    78
    6
    0
    Location:
    Lake Crystal, Minn
    Vehicle:
    2006 Prius
    We have an '06 and replaced the 12v last year in it's 5th year at about 100,000 miles. After checking on line and with the dealer, I bought one from Heintz Toyota in Mankato, Minn. for $138 in a box, a huge box - that could have been dropped out of a plane with out damage. I used a starter battery hooked up under the hood to save all of the settings and replaced the old one with out a glitch. It was easy.

    Returned the old one to the dealer. Had no symtoms, but from what I had read here, did not want to have any. I had checked the voltage with the old one using the MFD screens and it was still OK.
     
  12. Doc Willie

    Doc Willie Shuttlecraft Commander

    Joined:
    Jun 27, 2007
    1,714
    137
    0
    Location:
    Out there, somewhere
    Vehicle:
    2007 Prius
    Replaced mine after 3 years. Had run the old one dead several times at car shows running custom stereo and lights. Got to where it would only hold a charge for a couple days. Replaced with an Optima.
     
  13. penquin230

    penquin230 "Golden Hawk"

    Joined:
    Oct 21, 2008
    85
    12
    0
    Location:
    Atlanta, Ga.
    Vehicle:
    2010 Prius
    Model:
    IV
    Mfr Date: January 2005
    Model Yr: 2005
    Mileage: 88K
    Date Aux Bat Replaced: Nov 2011
    City/State: Atlanta, Ga

    I purchased my Prius on October 31, 2011.While going through the car checking everything in the days after purchase I found battery voltage to be 10.5vdc with no load. Prius worked great no apparent problems..I immediately ordered an Optima yellow top battery and within a week had replaced the battery. original battery had a date 12/19/2004 on it, so basically it lasted 6 years and 11 months.
     
  14. Britprius

    Britprius Senior Member

    Joined:
    Jun 14, 2010
    5,194
    1,835
    0
    Location:
    Herefordshire England
    Vehicle:
    2008 Prius
    Mfr 2008
    Miles 80,000
    Replaced March 2012
    UK

    I replaced the battery although it was still ok, and now on my ride on mower.
    Replacement battery 60 amp/hr at 20hr rate Haze AGM
    I cannot believe how few batteries are available in the US for the Prius compared to the uk but checking on your Ebay site I did find one very good contender that I have not seen mentioned on PC.


    Check out Vmax MB96-1300 should fit the Prius perfectly.
    12volt AGM deep cycle 65amp/hr capacity Length 9.2inch Width 5.5inch Hight 8.2
    This battery has almost double the capacity of the Optima.

    Or mb857-35 same capacity as the Optima
     
Loading...