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Can sombdy make me a favour?test his battery to compare?

jimpa10 Dec 13, 2012

  1. jimpa10

    jimpa10 Member

    I changed my battery (bosch 72ah or 74 ah i think it was) yesterday through garranty ,it lasted 4 months...
    however i started my engine today 2.0 tdi and i measure 14.3 - 14.4 which is great!but ... when i switched on the heat plus the lights (xenon) i saw 13.6. Is this ok?Can somebody check his car if has similar numbers? thx in advance
  2. mike foster

    mike foster Fossie VCDS Map User

    That is ok and perfectly normal. Bear in mind that these are 12 volt batteries so provided you don't get a volt drop below that when the engine is running you will be fine.
  3. Boon

    Boon Active Member

    I'd get the alternator checked out just to be on the safe side, doesn't matter how good or big the battery is if it isn't getting a good charge.

    You should be getting close to 14.4-14.8v no load & ideally no less than 14.0v

    12.6v fully charged, engine off - anything below 12.0v you are looking at a dying battery

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