On Thu, 1 Mar 2001 14:43:17 -0500 (EST), PAUL STENQUIST wrote:
> A battery of a given designation with more milliamp hours (mAh)
> will last longer, but voltage is virtually the same as another
> battery with the same designation but a lower mAh rating.
In _grossly_ oversimplified terms, the voltage a cell (battery) puts
out is determined by its chemistry (alkaline, lead-acid, NiCd, NiMH,
Mercury, etc.). The capacity (in current-hours) is determined by the
volume of chemistry that it contains, the internal efficiency of the
cell's construction, and probably other stuff.
As Paul said, a 2 Ah (2000 mAh) cell will put out its voltage for about
twice as long as a 1 Ah (1000 mAh) cell, but they'll put out the same
voltage if they're the same chemistry.
This is vastly oversimplified, too, since voltage produced graphed
against remaining capacity is a curve. For example, a battery
containing less than half its charge capacity might put out less
voltage than the same battery when it's fully charged.
TTYL, DougF
-
This message is from the Pentax-Discuss Mail List. To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .
