> Way lower than neccessary.  You are draining 2.8mA from the batter thru this
> divider.  The PIC A/D needs about 10Kohms for most 16F varieties to measure
> accurately.  Your impedence is nearly 15 times lower.  You could at least
> scale the resistors by 10 and cut down the wasted battery current
> accordingly.

There is something to be said for adding a little dummy load to the
battery during voltage sense.  If you have a micropower circuit which
is drawing mere microamps, pulling a milliamp or two from the
battery gives a clearer view of the true remaining capacity.

I'm using a very similar circuit for battery check in a system which
will have much higher peak currents for a few seconds at a time
than it does during battery check times.  By loading the battery
with the battery check circuit, I can simulate the peak current draw
and know whether I need to be worried.

Mike H.

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