Replace it or not?

Discussion in 'Motorhome Chat' started by DanielFord, Jul 11, 2016.

  1. DanielFord

    DanielFord Funster

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    I suspect that my cab battery has had it, I also suspect it is the one it originally had fitted when it was new, so its 5 years old. So earlier on, I went and removed the battery, and took a volt reading and it was 12.85 volts.

    It is now an hour later, and I have just taken a reading, and it is showing 12.6 volts. I am going to take another reading shortly, but what is the consensus from you electrickery people out there? Is that good or bad? To my mind since it isn't connected to anything, the voltage should stay pretty static.

    I know I could wait until tomorrow, but Halfords is just around the corner, and I am at the van!
     
  2. DavidG58

    DavidG58 Funster

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    You sound like you have already yourself doubt in the battery, I am guessing it has let you down as well

    Not too sure how much money you are taking about but my thought is, it may last a good while longer, but if I have been let I would be changing it

    I did mine, all my flat battery issues disappeared

    well that and being banned from plugging a little inverter into the cab battery anyway :LOL:
     
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  3. DanielFord

    DanielFord Funster

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    Not let me down, but the leisure batteries seem to run down quicker than I would have thought they should, so I think they are endlessly topping up the cab battery.
     
  4. MichaelT

    MichaelT Funster

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    If you take the battery into halfords or wherever they will do a test on it to tell you if you have a dud cell or something rather than relying on readings from home. Also unless the battery is disconnected completely there is likely to be continuous drain from alarms, clocks, internal electrics etc so not sure how relevant an hourly reading would be.
    IMHO better to get it tested correctly and renewed as the last thing you want is a flat battery just when you need to use the van.
     
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  5. DanielFord

    DanielFord Funster

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    D'Oh! I never thought of that! :D
     
  6. MichaelT

    MichaelT Funster

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    Only trying to help..........
     
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  7. jockaneezer

    jockaneezer Funster

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    Think I'd be pretty happy with those figures so far. Just changed the 10 year old original battery on my Volvo V50. Tested it similar to you and the voltage had dropped to10.6 volts within half an hour of disconnecting.
    What makes you think the hab batteries are topping up the cab batteries ? Could it be the other way round or maybe your alternator is struggling ? What van have you got ?
     
  8. DanielFord

    DanielFord Funster

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    I was chastising myself for not thinking of it, not the other way around ;-)
     
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  9. DanielFord

    DanielFord Funster

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    Well with the van powered down, after a sunny day the leisure batteries are showing 100% I do a level check and the vehicle battery shows 12.8 volts on the sargent. In the morning the leisure batteries will be down to about 90% and both leisure and vehicle show 12.5 volts.
    The leisure batteries are very new, so I don't suspect them. It's a Swift Sundance in answer to your question.
    Just taken a new reading, the battery (which is out of the van) is now showing 12.4, I think I'll go and grab a new one.
     
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