Re: Battery power

[Herbert H Gottlieb <herbgottlieb@JUNO.COM>]

The obvious answer is to use more series resistance in the
circuit to limit the current that the button-cell batteries must supply

If it is ESSENTIAL to use button cell batteries in a circuit
that draws a considerable amount of current, try connecting twenty
button cells in parallel. This should enhance their current-supplying
capabilities.

However, I wonder why you would want to use button cells
when the larger size batteries are much less expensive.

Herb Gottlieb from New York City
(Where an AA cell battery costs 50 cents or less
and a button cell battery costs $2.00)



On Tue, 01 Apr 2003 10:41:00 -0500 Tony Wayne <wayne@PEN.K12.VA.US>
writes:
> I'm helping one on of my students measure the power output of a
> battery. We load the battery with a 10 ohm resistor across its
terminals and
> measure the current through the resistor and the voltage across the
resistor.
> This works fine for the AA, AAA, C, and D size batteries. But the
button cell
> batteries, for watches, give a decaying current. Any ideas as to how
> I can alter my measurement method to get a steady current from the
button
> cell batteries?
>
> -Tony Wayne