? for the Electrical Engineers

["Dick Benjamin" <dickb@xxxxxxxxx>]

I think you mean 650 CCA rating, and that is not the rating that will answer
your question.   CCA is the measure of the ability of the battery to deliver
high starting current at a very cold temperature, and is actually a measure
of the internal resistance of the battery.  It has no direct relationship to
the energy storage capacity, which is what you are asking.

However, to answer your question, a healthy Imperial sized (group 27)
battery with a full charge can hold somewhere around 80 ampere hours of
energy, so your two tail bulbs, which are probably about 6 watts each, will
draw 1 ampere, thus theoretically they would stay lit for 80 hours.    In
real life, you can probably get around 50 hours out of them before they
begin to dim noticeably.

Dick Benjamin
----- Original Message ----- 
From: "Kerry Pinkerton" <pinkertonk@xxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Sunday, April 11, 2004 7:35 AM
Subject: IML: ? for the Electrical Engineers


> Can one of you EEs tell me how long with a fully charged 650amp battery
> light two tail light bulbs single filament, 12 V.
>
> Thanks
>
> Kerry
> wheelingmachines.com
> dte.net/57imperial
>