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Subject: Re: TWL: NiCad batteries?
From: Morley English (mttortuga@XXX.XXX)
Date: Sat Dec 01 2001 - 15:17:59 EST
No.
Nicads weigh the same or more than comparable Amp-hour Lead-acid.
The only advantage from a Nicad is as you draw power the voltage will
stay very close to the rated voltage. A Lead-acid will lose voltage as
you draw power from them. If you graph both types, the voltage over amp
hours for the Nicad will be a horizontal line at rated voltage until the
last 90-95% of the capacity then a vertical drop to 0 volts. A Lead-acid
will graph as a 45 degree slope from rated voltage to 0 volts as you draw
power from it.
Morley
>
> Is it not also the case tha nicads have a superior energy/weight
> ratio and
> thus they save weight?
>
> Hal
>
>
>
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