[Nfb-science] Servicing Lead-acid Cells

[Thomas Page]

Hi,
  Not a very precise method.... When I once had an old car with an unsealed
battery I would gently lower a stick into the hole on the battery and the
feel of hitting the water would give me an idea of how much to add.

Thanks,
Tom

-----Original Message-----
From: nfb-science-bounces at nfbnet.org [mailto:nfb-science-bounces at nfbnet.org]
On Behalf Of Mike Freeman
Sent: Wednesday, August 16, 2006 4:15 PM
To: electronics-talk at nfbnet.org
Cc: nfb-science at nfbnet.org
Subject: [Nfb-science] Servicing Lead-acid Cells

Hi, all.

I have two 12V marine batteries on my travel trailer. They are lead-acid 
cells but not sealed. Short of purchasing sealed cells or gelcells, how 
can I service them unassisted. Specifically, how can I determine if the 
cells need water? Also, is there an accessible hygrometer?

Thanks.

Mike Freeman
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