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Subject: RE: Re[3]: battery measurement
From: Olivier BUTLER (obutler_at_unim.fr.memec.com)
Date: 2002-09-19


The only way to get an accurate value of the remaining time is to monitor
the current during charging and discharging ( in use ) , then calculate the
amount of energy ( kJ ) in the battery. ( Some electric shaver to that ).

Olivier

-----Message d'origine-----
De : Tjerk Schuringa [mailto:regenpak_at_yahoo.com]
Envoye : jeudi 19 septembre 2002 07:51
A : rockbox_at_cool.haxx.se
Objet : Re[3]: battery measurement

--- Uwe Freese <mail_at_uwe-freese.de> wrote:

> The battery status (percentage) is only calculated by the voltage of
> the battery. So if it jumps up and down, the voltage of your battery
> jumped up and down.

Maybe it would be a better idea to just give the raw voltage of the battery.
The percentage does not give a good indication of the actual time left as
this
is dependent on so many factors. I used to have a cellfone (ahem, Sagem)
that
would give the actual voltage, and that was great. I now have a Motorola and
it
says "40%" for days and then all of a sudden it conks out on me "LoBatt".

T.J.

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