engine battery

Discussion in 'Tech/Mech General' started by eirebus, May 28, 2010.

  1. eirebus

    eirebus Read Only Funster

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    i have just had a new starter battery fitted to my 98 ducato by a dealer its a 75ah the original was a 100ah he says this is ok could anyone give me more info on this like will it start in the winter etc.:Blush:
     
  2. lebesset

    lebesset Read Only Funster

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    the manufacturer wouldn't go to the expense of fitting a 95/100 if it wasn't necessary to cover all eventualities
     
  3. lebesset

    lebesset Read Only Funster

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    I have a 75 to start my petrol car !!!
     
  4. Terry

    Terry Funster

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    Hi the 75 ahr is not too important you need to know the cold cranking hr- the battery will have 75 amp hr and cc number say 550 - the higher the second number the easier it will start. My 2.8 iveco has 695 while a tranny gets away with 550
    terry
     
  5. paulmold

    paulmold Read Only Funster

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    My 1997 Boxer (same as Ducato) is also fitted with 75amp. Mine is petrol, you do not say whether yours is petrol or diesel, if diesel I would have thought you needed a bigger one.
     
  6. Geo

    Geo Trader - Funster

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    As Terry has said the cc figure is the important one
    We have 75 amp batteries on the shelf with 225amp cold crank(small car) and 650 cold crank (3Ltr Diesel)
    But both 75amp hr
    Geo
     
  7. eirebus

    eirebus Read Only Funster

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    thanks guys the van is a 2.5l turbo diesel and the battery cc is 650 it was fitted with a 700cc 100ah :thumb:
     
  8. pappajohn

    pappajohn Funster Life Member

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    battery technology has moved on in 12 years....

    the 75ah will be the modern equivelent of the old 100ah.


    dont worry about it :thumb:
     
  9. Peter James

    Peter James Read Only Funster

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    As I understand it...The performance of a battery depends on the conditions under it is operated - like the speed and temperature at which it is discharged.. Naturally manufacturers tended to use the most ideal conditions to test their batteries when measuring the performance, that made the amp hour of their battery look the highest. But there has recently been an EEC standard forced on them that they all now have to use. The result of this is that a battery that was claimed by the manufacturer to be 100 amp hour when they tested it under ideal conditions, may now only be 75 amp hour when tested under the conditions laid down by the EEC directive.
    So, as pappajohn says, todays 75amp hour battery could be the equivalent of a 100 amp hour battery 12 years ago..
     
  10. pappajohn

    pappajohn Funster Life Member

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    i had read about that EEC directive but couldnt remember much about it so thought it best to keep me gob shut :Blush:
     
  11. imprint

    imprint Read Only Funster

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    We've gone the other way, from 75 to 100, in our 03 Ducato, mainly because the motor factor offered the same proce on the larger battery, same manufacturer, and there was room enough for it.

    No engineering science, it just seems sensible and we're well within weight limits.
     
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