Battery doesn't draw current - time to replace it?

Discussion in 'Tech/Mech General' started by The Lobster, Sep 11, 2016.

  1. The Lobster

    The Lobster Funster

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    The battery that came with the MH can show 60% capacity on the control panel but if I put the (LED) TV on and draw a couple of amps, after a few seconds the battery low warning flashes on the control panel and the controller switches the 12V off. I assume this means it's not holding charge and the only solution is to replace it?
     
  2. funflair

    funflair Funster Life Member

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    Quite possibly, but 60% is pretty close to flat anyway as 50% would be concidered as far down as you should be taking it. When you are on charge what Voltage does the panel show for the habitation battery, even if it's not taking and holding a charge it should be showing between 13 and 14 volts just to prove that your battery charger is OK.

    Martin
     
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  3. pappajohn

    pappajohn Funster Life Member

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    Certainly sounds like it.
    On charge it will show charge voltage, not actual battery voltage.
    In simple terms, remaining battery percentage is worked out from remaining voltage.
    For our purposes.......
    12.7v =100%
    12.4v = 50%
    12.1v = dead
    All assuming no load and rested for an hour after charging.
     
    Last edited: Sep 11, 2016
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  4. WillH

    WillH Funster

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    Buy a new battery.
     
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  5. Stealaway

    Stealaway Funster

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    If only for peace of mind. There is nothing nicer than a brand new battery:sun:
     
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  6. Bobby22

    Bobby22 Funster

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    Before you discard it, check that the cells are fully topped up. if there are any dry cells it will probably be goosed, if it has low cells it may recover if its topped up and charged properly.
     
  7. The Lobster

    The Lobster Funster

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    It's a Lucas LL26MF which is a "sealed maintenance free" type :(
     
  8. Stealaway

    Stealaway Funster

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  9. The Lobster

    The Lobster Funster

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    What's a "sticker battery"? In the battery compartment in the floor I can fit a longer (but not wider) battery so I was thinking about 120 Ah capacity rather than the current 95 Ah. I was looking at another Lucas, but from their higher performance Traction XC range (an LX35MF). WDYT?
     
  10. Langtoftlad

    Langtoftlad Funster Life Member

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    Sticker battery is a generic no name product made by who knows who - certainly not by the manufacturer named on the label.
    One of the items best not to scrimp on
     
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  11. Zains Pops

    Zains Pops Funster

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    I recently bought two vehicle/ starter batteries for the van (as it happens unnecessarily but that's another long tale) Battery Megastore were very good, with superb advice, product availability and delivery...highly recommended you give them a call. Just google for their details.
     
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  12. The Lobster

    The Lobster Funster

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    So... given our preference for not being hooked up all the time I've chosen an NCC class "A" battery - Go Outdoors do a very nice 19% discount on a 100 Ah Platinum AGM model at the moment which would fit perfectly, so I think we'll give that a go.

    From what I've read an AGM design would be longer life with motorhome deep cycle use/lighter/faster charging - and better performance in the cold - all of which look good reasons to consider it. Other than cost, is there any downside to AGM?
     
  13. Stealaway

    Stealaway Funster

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    Once again a sticker battery and over priced. Avoid.
     
  14. The Lobster

    The Lobster Funster

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    You may well be right - but what makes you think that in this case? Go Outdoors are a pretty reputable outlet and the discount is typical of their loyalty scheme... would they risk selling presumably illegal "clones"?
     
  15. Stealaway

    Stealaway Funster

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    They are not illegal just a generic battery bought from their wholesaler. The AA don't make batteries either and have no idea or care about the quality. Only buy a battery a battery with a manufacturers name on it. Numax - Varta - ect IMHO!
     
  16. The Lobster

    The Lobster Funster

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    Researching Platinum a little bit is quite revealing - they aren't an OEM but they don't appear to be a sticker battery provider either --- they claim that "manufacturers who supply Platinum Batteries are OE approved and supply to a ‘Spare Parts of Matching Quality’ standard. This is achieved by the same production lines, same machinery, same technology and same quality control as that used for vehicle OEM’s". For the same spec they come out about the same price as Numax and both are considerably cheaper than Varta... but the Varta spec clearly shows a much higher number of cycles (and hence presumably longer life), which seems to have a big impact on price in general. However I'm dubious about whether I need a 600 cycle battery...
     
  17. Stealaway

    Stealaway Funster

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    'They' claim would be a give away for me.
    Honestly you make your choice and take your chance, its just that I have been buying domestic batteries for 15 + years on both my NB's and now MH's and have seen too many batteries with stickers that claim to be the bees knees only to be disappointed.
    £149.95 also seems to be very expensive for an unknown battery.

    Have a look at these - I bought two 110A Numax batteries last year

    https://www.google.co.uk/#q=numax+110+leisure+battery&tbm=shop
     
  18. Bart

    Bart Funster

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    I bought 3 of these :

    They might be sticker batteries ??? , lets just hope they are ok :) now i start using my inverter....
     
  19. The Lobster

    The Lobster Funster

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    So after far too much further research it seems to boil down to Numax for value or Varta for quality... or perhaps Numax, with the money saved going towards a solar panel, on the basis that if I can trickle charge a Numax it will ultimately let me stay disconnected longer (even if its somewhat lower cycle count may mean it won't last as long).
     
  20. Stealaway

    Stealaway Funster

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    Now you're getting to be a battery expert. Knowledge is always a good thing.
    Also you could have sold the van before you need to replace them.
    I can strongly recommend solar panels if you're going to spend time parked up and 'Off Grid'
     
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