mcquinn that's a cool Idea, and part of my inspiration. But I wasn't specific enough in my post. what I'm talking about is using a cell phone charger that plugs into a house outlet. My thinking is that a cell phone home charger puts out 5V like a USB port. It has worked in mock-up and I have chosen a mini flashlight enclosure. I'll be attempting the soldering soon. Just wondering Is my theory flawed?, if its been done and what are peoples experience's ?