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Subject: Re: [M]: Battery Tester
From: Robert Fields
Reply To: mapug@shore.net
Date: Wed Jun 25 00:13:59 1997


OK ... my ignorance will come out with this message. I can always throw a
meter on the battery to determine the voltage. But, what will tell me how
much "juice" is left in the battery ? I realize that voltage falls as the
battery is depleted. But is there any way to determine determine approx how
many hours are left at a certain voltage ?

Thanks ..... -Robert

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On Tue, 24 Jun 1997, R. A. Greiner wrote:

> The Micronta Auto Battery and Charging System Analyzer sold by Radio
> Shack is quite satisfactory for testing 12 volt systems such as the Lead
> Acid battery systems in automobiles or any nominal 12 volt battery of
> the Lead Acid type.
>
> In one sample I have measured (others may vary slightly) the lights
> indicate the following voltages:
> greater than 16 volts -- Green and Red
> 14.27 volts -- Green only
> 14.11 volts down to 13.15 volts -- Green and Yellow
> 13.10 volts -- Yellow only
> 11.54 volts -- Yellow and Red
> less than 11.00 volts -- Red only
>
> If you wish to judge your system with these voltages, purchase this
> unit. There is no point in trying to build this circuit when it only
> costs $5.99. You can not possibly build it for that price.
>
> Doc G
>