An Interstate Group 91 battery I bought last year had a similar
problem. Despite it testing as okay, it would loose it's charge over
night. I replaced it and the replacement does not exhibit the problem
at all.

On Sep 1, 2008, at 5:36 PM, Cullen Stewart wrote:

> I have a 2 new interstate group 41 batteries and the stereo is
> hooked up exclusively to the aux. battery. That battery goes
> completely dead overnight without any other usage beyond the clock
> on the stereo. Do I have a short? Has anyone encountered this
> before? The battery is new and was tested at the Interstate battery
> dealer when I purchased it. It is annoying considering I know the
> battery is going to die from being 100% discharged too many times.