On Mon, 18 Oct 1999 19:08:39 -0700, you wrote:

>Since several of you asked for my findings on low power comparators, here
>goes:
>
>History:
>Original requirement was for a low battery voltage detector circuit for a
>PIC based data logger.  
Remember you don't need to continuously monitor battery level. You can
use a low-impedance divider, switched on occasionally. This avoids
many of the leakage issues etc. 

If using an external comparator, you don't even need a low-power one -
just supply its power from a PIC pin so it's turned off most of the
time.