Battery question

Discussion in 'Motorhome Chat' started by tony_g, Nov 14, 2012.

  1. tony_g

    tony_g Funster

    Aug 29, 2010
    Nuneaton,some of the time
    Probably a dim question - like my lights but could I have some advice?
    My recently acquired Laika Rexosline 680 has a mixture of LED and halogen bulbs in the habitation. I have noticed that the halogens are significantly brighter when on hook-up than when on the leisure battery. This applies whether there are one or two or several on.
    Is this an indication that the battery is past its best, as I have always assumed that ehu or not, the 12v lights run off the battery - even though the hook-up is feeding the battery. A bit like running a bath with the plug out. Have I got this wrong? Btw, even after a full days driving the battery seems to top out at 13.1v. Time for a change?
  2. pappajohn

    pappajohn Funster Life Member

    Aug 26, 2007
    YO11 2BD
    when on hookup it's usual for the battery charger to supply around 13.6v to all 12v appliances with the battery acting as a 'sponge' for any excess power not used.
    thats around 1v more than your battery off hookup.

    you will generally get a little more power directly from the charger/power supply then from your battery.

    as a guide, if your battery doesn't appear to last long off hookup then its probably on its way out otherwise i wouldn't worry too much.
    Last edited: Nov 14, 2012
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