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From: piety@hplabs.UUCP (Bob Piety )
Newsgroups: net.analog
Subject: Re: an observation,a new angle on batteries
Message-ID: <1535@hplabs.UUCP>
Date: Fri, 1-Feb-85 10:10:00 EST
Article-I.D.: hplabs.1535
Posted: Fri Feb  1 10:10:00 1985
Date-Received: Sat, 2-Feb-85 12:00:42 EST
References: <215@abnji.UUCP> <597@amdcad.UUCP> <559@mako.UUCP>
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Organization: Hewlett Packard Labs, Palo Alto CA
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 >I just got a cordless drill, and the instructions seem contrary to
 >my beliefs about nicads. They say that I should recharge the moment
 >that I notice a reduction of torque from the drill, i.e. without
 >completely discharging the batteries...why should I recharge so soon?


Since the discharge curve of a nicad is rather flat, the moment you "notice
a reduction in torque" is when the cells are ALMOST discharged.  I believe
they recommended that point since most users would still use the drill to
finish that last hole.  Waiting until the drill quits altogether is
discharging the cells TOO deeply.


Bob