johnH20
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| posted on 3/7/17 at 06:05 PM |
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Is my battery realy dead?
Put my car away yesterday without realising I had left the lights on ( used as DRLs ). Flat battery this morning unsurprisingly. It is a PowerVamp 25
( Rebadged Odessy 680? ). Although it is 5 years old it has always appeared very healthy and will restart the car easily after a month of inactivity.
It now reads 4 volts and will not accept charge from my 'intelligent' charger. Is the charger not that intelligent or is the battery dead?
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adithorp
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| posted on 3/7/17 at 06:10 PM |
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Battery maintenance chargers don't like dealing with flat batteries so I'd say it's that and not the battery
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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pmc_3
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| posted on 3/7/17 at 06:10 PM |
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I'd put a non-intelligent charger on it for a bit to get a bit of juice in to it and then swap back. Some of the intelligent ones won't
charge it if it's completely flat
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coyoteboy
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| posted on 3/7/17 at 06:17 PM |
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Just hook it up to a live battery/car for 10 minutes. Then try again.
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gremlin1234
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| posted on 3/7/17 at 07:20 PM |
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as above
or jump start it, then run for a few minutes, then the intelligent charger should be clever enough.
quote:
Is the charger not that intelligent
normally they don't like charging below a few volts, to ensure they are connected, not 'shorted' or the incorrect polarity
edit, clarity ;-)
[Edited on 3/7/17 by gremlin1234]
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perksy
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| posted on 3/7/17 at 08:13 PM |
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You might be lucky with a re-charge
but in the longterm PC680's don't like being totally discharged, ask me how I found this one out 
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britishtrident
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| posted on 3/7/17 at 08:34 PM |
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In the long term get special voltage sensing DRL relay that switches the DRL only when the alternator is actually producing more than 13 volts.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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gremlin1234
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| posted on 3/7/17 at 09:28 PM |
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quote:
Originally posted by britishtrident
In the long term get special voltage sensing DRL relay that switches the DRL only when the alternator is actually producing more than 13 volts.
or just when the engine/ignition is on
[Edited on 3/7/17 by gremlin1234]
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johnH20
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| posted on 4/7/17 at 05:55 PM |
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Glad to report that the trick of connecting to another battery seems to have worked.Dead one up to 10 v in 20 mins and now charging happily. Whether
it will be good long term I do not know but thanks for the tip.
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coyoteboy
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| posted on 4/7/17 at 08:44 PM |
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In my experience you get about two goes at that process and then you're buying a new one. Glad to hear go number 1 was successful!
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