> we have a simple board based on pic 16f877. a lithium battery
> powers the circuit. the spec for the battery specifies that if the
> battery ever goes below 3v, the battery would be permanently
> damaged.
>
> now, how to constantly monitor the remaining power? how to
> turn off the circuit when the battery power reaches the 3v range?
> can we do this without adding too many components?

The easy way would be to measure the battery with the 877's
own ADC. With built-in comparators and voltage references
available you should be able to figure something out

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