Hello, I am using the 12c509 on a really tiny robot. And I would like to power the PIC up with the smallest battery out there for about an hour. Anybody have ideas from experiences on what battery to use to last that long. Also, ideas/routines on the usage of the PIC to allow it to be as efficient as possible (I think using sleep command???) I am a little unclear in these places!! Could someone give me some advice and help, on what battery to use and how to make the PIC be as efficient as possible while still allowing to change outputs on change of inputs. Thank You Again to all! +--------------------------+ | Sep Seyedi | | -> me@sep.2y.net | | -> http://sep.2y.net | +--------------------------+