I use rechargeable batteries constantly, that is the reason for the question. I don't see a reason NOT to have it shut down automatically after x-minutes.

Tony, your comment, I don't understand. Why don't you just NOT turn it on until you need to start using it?

It's not a deal killer, since batteries are rechargeable, I'm just surprised it isn't a feature for devices like this. I mean, if you have not used it in an hour or whatever, you've forgotten about it.