Thanks for the reply, what I am trying to do is to prevent any damage to any components because of a low battery. What I mean is if I am using a 9V battery to feed the lp2950 5v regulator and forget to turn if off over a period of time the battery will be discharged and and I would like to "disconnect" the battery from the circuit that way I could prevent damaging any components like voltage regulator and anything things else connected that requires 5v. I having been experimenting with a 6.2v zener but something around that voltage would allow me to get the maximum use of my 9v battery but would like it to have a very low current. Anyhow I am just looking for a suggestion, I've been searching the forum but haven't found anything of interest on a low battery condition but after few batteries I figured I needed to do something.


Thanks