battery getting warm while on tickle?

Discussion in 'Engine' started by Olivier, Oct 8, 2011.

  1. Olivier

    Olivier MB Enthusiast

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    Hi,
    is it OK for a 12V car battery to get warm on tickle charge ? Its about 30 to 31 degres centigrade on the side.
    When I recharge the little AAA toys battery, they do get really hot, then I hope it is OK too for a car battery, or its not suppose to be?
    Cheers.
     
  2. Martyn_n

    Martyn_n Active Member

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    Maybe its getting warm because it's trickleish.
     
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  3. OP
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    Olivier

    Olivier MB Enthusiast

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    It might LOL
     
  4. OP
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    Olivier

    Olivier MB Enthusiast

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    Its actually 34 degres celcius on the side walls now that the thermometer stabilised.
     
  5. BTB 500

    BTB 500 MB Club Veteran

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    I don't think that's normal, are you sure it's only on trickle charge?

    I've got a 75 Ah battery on maintenance charge right now and it's cold to the touch.
     
  6. BTB 500

    BTB 500 MB Club Veteran

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    NiMH (AA, AAA) battery chemistry is different btw, and it's normal for those to get hot at the end of the charge cycle.
     
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  7. OP
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    Olivier

    Olivier MB Enthusiast

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    Might not be normal as after charging it for a long period of time, it still shows only 12.4V :(
    This mean from what I read that the battery is at about 70% :(
     
  8. Dieselman

    Dieselman Banned

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    It means it has a dead cell, hence it getting warm.
     
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  9. OP
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    Olivier

    Olivier MB Enthusiast

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    I guess this is why the 70% as well :(
     
  10. johnsco

    johnsco MB Enthusiast

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    When fully-charged, it should read about 13.8 volts.
     
  11. Dieselman

    Dieselman Banned

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    That's too much.

    Fully charge the battery, leave to stand fro 24Hrs then measure with only light load on. It should read 12.5v if good.

    Another test is to use the starter motor for 15 seconds and check the voltage under cranking. If it drops below 9v the battery is toast.
     
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  12. CKLclive

    CKLclive Banned

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    Its normal
     
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  13. OP
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    Olivier

    Olivier MB Enthusiast

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    cannot do that as the engine will start before that...
     
  14. OP
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    Olivier

    Olivier MB Enthusiast

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    OK, its getting hotter now, 35+, I put it on highter charge ( fast charge, 6Amp) to boost it a bit, disturb what ever is not working in there, we'll see what is happening in an hour :)
     
  15. Monkeylegend

    Monkeylegend MB Enthusiast

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    BOOOOOOOMMMMMMMMMMMM !!!!!!!! :doh:
     
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  16. Dieselman

    Dieselman Banned

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    Not if you disconnect the glow relay.
     
  17. OP
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    Olivier

    Olivier MB Enthusiast

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    I wouldn't go there as on veg it might gum the rings with the un-burned oil...
     
  18. Monkeylegend

    Monkeylegend MB Enthusiast

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    Is it chipped?
     
  19. OP
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    Olivier

    Olivier MB Enthusiast

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    chipped? No? Got few mod tho, like advance timing, reduce injector pop, by-passing the AIT, EGR delete, MAF from a CDI and put at an angle, FPHE, bypass the pre-filter. I think its about it , yet...
     
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  20. Dieselman

    Dieselman Banned

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    Why fit a MAF from a CDI and why angle it, both those things will make it read less.
     

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