Re: Semi [OT]: What is the black deposit on the underside of wet lead acid battery vent caps?

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#430

From: atec77
Date: Mon, 27 Jun 2011 07:55

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On 27/06/2011 4:42 PM, Dennis wrote:
> Does anyone know what the black smudgy deposit is that forms on the
> underside of wet cell lead acid automotive batteries is?
>
> It looks a little like soot and is easily wiped away.
>
> I've heard it can suggest the battery is failing. Is there any substance to
> this or is it just an anecdotal red herring?
>
> Cheers
> D.
>
>
Oxide
  is bad

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From: atec77 <atec77@hotmail.com>
Newsgroups: sci.electronics.design,aus.electronics
Subject: Re: Semi [OT]: What is the black deposit on the underside of wet
 lead acid battery vent caps?
Date: Mon, 27 Jun 2011 17:55:24 +1000
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