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  • Battery state of charge indicator

    Hi,

    I have a Century maintenance free cranking battery with a little round clear indicator that is meant to show what hte battery is doing. The battery is working fine and holding charge however the indicator is showing that it needs chargiing, even after leaving on the charger for 36 hours.

    could this mean that that despite being maintenance free that it needs more water in the cells?

  • #2
    Wil
    Senior Member
    Wil - how old is the battery and has it been subject to any major stress (e.g. been fully drained for a long time)? I have one of those indicators though on my car it was green but the battery was bad, and on my Prado it's just black but is actually fine. I'm not sure of their reliability TBH.

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    • #3
      its probably about a year old, its seen no major stress. I might take off the battery clamp and check the water level, its only a 5 minute job.

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      • #4
        Century are good I’d email them or talk to the people you got it from as I had a century in my old discovery was month out of warranty and they still replaced it! Battery was brought at auto one

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        • #5
          Yeah agreed, see if they will replace under warranty, if nothing else it'll reset the clock on your next batter change.

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          • #6
            another brand of mine did similar but ended up coming good

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            • #7
              Those indicators are measuring the specific gravity of only 1 cell so are just a guide only.
              If the acid level is low they will indicate low charge and if the acid level is too high they will indicate fully charged even when not.
              If in doubt check the acid levels and load test to confirm one way or another.

              Lee
              '18 VX, Billies with Dobinson springs, Summit bar with Narva Enhanced Optics to help my old eyes

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