Thank you so much for these great information.
"Dave Lippincott" <[EMAIL PROTECTED]> wrote in message
news:48687@palm-dev-forum...
>
> In the real world, as the battery is used, the voltage drops. That's how
> one knows its time to charge or replace it. The percent SysBatteryInfo
> returns is the percentage of power remaining in the battery. I believe
its
> calculated by matching the battery voltage on a battery 'type' dependent
> curve (or Palm could use a calculation) to come up with an estimation of
how
> much longer the battery may last. Palm doesn't publish the numbers.
> [not to bad-mouth your professor...] As I remember from my days in
college,
> teachers tend to use 'ideal' cases when studying electronics. Your
> professor may have been referring to use of an idealized battery that can
> provide the necessary current at a steady voltage. You will find that all
> real batteries drop in voltage as they are depleted. (I do know of a few
> battery chemistries that behave closely to the idealized battery behavior
> but still don't maintain a constant voltage during use)
>
> ----- Original Message -----
> From: "Iehab AL Rassan" <[EMAIL PROTECTED]>
> Newsgroups: palm-dev-forum
> To: "Palm Developer Forum" <[EMAIL PROTECTED]>
> Sent: Wednesday, May 09, 2001 2:01 AM
> Subject: SysBatteryInfo
>
>
> > 1-I am using SysBatteryInfo command to get battery information such as
> > voltage and power. However, I am conducting a research to mesaure
> remaining
> > voltage and power. My professor told me that voltage should not be
changed
> > on battery. Palm shows that voltage is variable, it changes its voltage
as
> > machine is powered on. How that happend ?
> > 2- What does that mean "Percentage of power remaining in the battery"
in
> > SysBatteryInfo command , is it power, energy ,or percentage of voltage.
If
> > it power , how could palm calculate that. And if it energy , I would
like
> to
> > knnow what algorithm palm used.
> > I appreciate your prompt reply.
> > Regards,
> >
> >
> >
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>
>
>
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