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battery?

  • 28-10-2021 2:28pm
    #1
    Registered Users Posts: 643 ✭✭✭ celica1994
    Registered User


    is 12.25V an acceptable level for the battery to be at hooked up to the car in the morning after resting overnight?



Comments

  • Registered Users Posts: 17,424 ✭✭✭✭ cnocbui
    Registered User


    Should be closer to 13.8v.



  • Registered Users Posts: 5,438 ✭✭✭ Ubbquittious
    Registered User


    Not fantastic. Try charging it and see does it go back down



  • Registered Users Posts: 643 ✭✭✭ celica1994
    Registered User


    yea it aint been holding a great charge lately



  • Registered Users Posts: 339 ✭✭ Dirty Nails
    Registered User


    No load voltage means very little unless it's tested to be a good battery.



  • Registered Users Posts: 339 ✭✭ Dirty Nails
    Registered User


    That would be some battery :)

    Where did you get that figure from?



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  • Registered Users Posts: 643 ✭✭✭ celica1994
    Registered User




  • Registered Users Posts: 339 ✭✭ Dirty Nails
    Registered User


    Expect so. Only that the answer didn't match the question :)



  • Registered Users Posts: 5,194 ✭✭✭ zg3409
    Registered User


    Have you an issue with car starting? How many hours a day is car on road? How old is battery? It's typically advised to replace every 2 years particularly if it's very slow to start. 12.2 is not great if car was driven for an hour the previous day but it's hard to know without a proper battery tester and to check voltage with engine running. With engine running it should be 13+ volts.



  • Registered Users, Subscribers Posts: 13,070 ✭✭✭✭ antodeco
    Warning: Contains traces of nuts


    Every 2 years? Every one of my batteries I've ever had last me 5-10 years quite easily!



  • Registered Users Posts: 117 ✭✭ phelimb
    Registered User


    Likewise - I've never gotten less than 5 years from any car battery. I did have to replace two last year - one was 7 years old and the other around 5. But neither car was being driven much due to travel restrictions. Every 2 years seems way too often...



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  • Moderators, Science, Health & Environment Moderators Posts: 17,448 Mod ✭✭✭✭ Sam Russell
    Moderator


    I thought the accepted life of a car battery was at least 6 years. Winter is bad for a battery, as in leaving the car unused for a month or more. I had to replace my battery at six years, almost to the day, but it had hardly moved in the previous year due to Covid.



  • Registered Users Posts: 1,652 ✭✭✭ Miscreant
    Registered User


    I have owned 8 cars so far in my lifetime and only had to replace a battery once. It was my first car and had been sitting idle for about 18 months before I bought it, so that probably killed the battery.

    My last car, I had for 8 years and it was 2 years old when I bought it. Was still on it's original 12v battery when I moved it on with no signs of issues. The car started every time I needed it to. The one before that, I had for 5 years and it was 4 years old when I bought it, also on its original battery (I knew the original owner), showing no issues when I sold it on. Replacing a battery every 2 years is wasting money unless you are leaving a car sit for 6 months at a time or have some sort of parasitic draw that is flattening the battery regularly. At that stage, I would be looking at what is wrong with the car and charging system as opposed to the battery itself.

    Anywhere in the mid 12v range (12.4 to 12.8 or so) is fine for a car battery to sit at with no load. Once the alternator starts providing a charge, then it should be reading somewhere near the 14 range (13.8 ish). If the OP is getting these figures then I would consider the battery to be healthy. A voltmeter is a very cheap piece of equipment to buy (sub €20) and a handy thing to have anyway.



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