At 7:19 PM +0000 3/7/02, olympus-digest wrote:
>Date: Thu, 07 Mar 2002 11:04:28 -0500
>From: Johnny Johnson <jijohnson4@xxxxxxxxx>
>Subject: Re: [OM] OM1 batteries
>
>At 03:20 PM 3/7/02 +0000, Wright, Steve \(Darlington\) wrote:
>
> >John, I don't wish to be a PITA, but for the record the battery packaging
> >on my Wein Cell states the voltage is 1.35v - which is exactly what the
> >old mercury battery output.
>
>Hi Steve,
>
>Did you check the voltage with a meter or just depend on the markings on
>the package? I've only checked one but it was 1.45 volts, fresh out of the
>pack. I've read where others have had similar results on the latter
>production batteries.
Be careful. Voltmeters don't load the battery enough to bring many battery
types down to the operating voltage range. You'll get a more accurate
measurement if you measure the voltage across a 10,000-ohm resistor connected
to the battery. This will draw 135 microamps if the battery voltage is 1.35
volts under this load. By contrast, cheap voltmeters are often 1 megohm,
expensive voltmeters are 10 megohm, and both draw far too little current.
Joe Gwinn
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