[SI-LIST] Re: Theoretical Battery Life
- From: "Feldman, Richard" <rfeldman@xxxxxxxxxxx>
- To: <michael.neaves@xxxxxxxxxxx>, "si-list" <si-list@xxxxxxxxxxxxx>
- Date: Wed, 20 Nov 2002 20:39:49 -0800
Mike,
Battery data sheets are easy to find online, for example:
http://www.duracell.com/oem/Primary/Alkaline/mx1300.asp
Your answer is a day or two at room temperature,=20
depending mainly on the minimum voltage you can tolerate.
Battery V drops continuously under steady load.
If you stop at 1.1 volts/cell, which would be appropriate
for a NiCd, you are leaving a significant fraction of the=20
available energy in the alkaline battery.
Rich
-----Original Message-----
From: Mike Neaves [mailto:michael.neaves@xxxxxxxxxxx]
Sent: Wednesday, November 20, 2002 7:59 PM
To: si-list
Subject: [SI-LIST] Theoretical Battery Life
Hi Everybody!
I have a question that I would like answered....
This question doesn't have much to do with SI, but, with the
"plethora" of electrical knowledge available in this forum, I expect
that someone may know the answer I am searching for...
The question is:
How long can I expect '2' alkaline D cell batteries connected in
series
to provide a relatively constant current of 0.3 Amps?
i.e. 3 volts / 10ohms =3D 0.28 to 0.30 Amps
Thanks,
Mike
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