> Hi all,
>
> Has anyone got a rough idea on a 9V battery life when the circuit draws
> about 16mA. I can reduce by a few milliamps by substituting a 78L05 with
> another type.
>
5000 Hours.

Tony, with all due respect,  your question is meaningless (as is my answer).
You  have to give more information, as do I to make my answer sensible.

I have not told you, the nominal battery capacity, the chemistry, nor the
manufacturer and model..

As it stands your question is akin to "I have a vehicle how fast will it go
?"

The vehicle could be a bicycle or a Space Shuttle  8-)

 Regards

Chris Carr

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