what is the voltage of your 12v battery?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by arewethereyet, Mar 17, 2012.

  1. R-P

    R-P Active Member

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    Brandless 55Ah (not 45Ah).

    Charging now. Will follow up, although today is the only day this year it is actually freezing :) so that may skew the results.
     
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  2. tampaite

    tampaite Member

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    2007 Prius Touring model : 11.9v(engine OFF) and 14.3v(engine ON)
    2007 Prius Regular model : 11.8v(engine OFF) and 14.3v(engine ON)

    No issues with starting the engines with the 12v battery at 11.8 or 11.9v
     
  3. sillylilwabbit

    sillylilwabbit Active Member

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    12.1 is kinda low for a new battery. May need to fully charge it? I think your car in ready mode should be higher?

    My 3 1/2 year old battery measures:

    1 push: 12.5
    2 push: 12.3
    Full load (full blast heater, rear defroster, headlights on): 11.1
    Ready mode: 14.7




    iPhone ?
     
  4. bisco

    bisco cookie crumbler

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    mine almost 4 year old is 12.4 dead cold measured at the jump post.
     
  5. luckyboy

    luckyboy Member

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    My 2007 (base with original small OEM battery) was measuring mid 11v in the morning and dropping to 9v and killing the car when starting with headlights and defroster on. Needless to say I am in the process of changing the battery. Ordered a new AGM from Rural King that just arrived showing 12.7v, I put it on the trickle charger and will drop it in the prius tomorrow (well will probably require some modification to accommodate the larger battery since mine came with the smaller, non-smart key battery).
     
    #25 luckyboy, Feb 11, 2016
    Last edited: Feb 11, 2016
  6. bisco

    bisco cookie crumbler

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    rural king?
     
  7. luckyboy

    luckyboy Member

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    #27 luckyboy, Feb 11, 2016
    Last edited: Feb 11, 2016
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  8. bisco

    bisco cookie crumbler

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    wow, that's the best i've heard, by far.
     
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