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Subject:Re: How do you tell how much juice a battery has/?
From:george jannini
Date:Tue, 26 Jan 2010 19:00:00 -0500

I'm using a digital voltmeter that plugs into a cigarette lighter
socket. It cost me 15 bucks or so at Wally World. Driving with an
average electrical load, the voltage reading is around 13.8.

  The elderly battery that I just replaced was dropping to around 12.3
or fewer volts overnight.  Although starting wasn't a problem (yet) I
replaced it anyway.  Morning after voltage is now 12.8.

George/ATL
'89 Westy