I just bought a turbo vado sl 4 and the LBS mentioned there was a way to lock the battery in off position when not using it so if someone stole it, at least they couldn't speed away at 28 mph. I didn't ask for details, figuring it was in the manual, but didn't see it mentioned anywhere. Is what he said accurate, and if so, how do you do it? Not a huge deal but would be nice to know. Thanks