Lanc.
I agree with everyone elses comments, although if it had a rechargeable battery for power down scenarios and a test circuit for battery health, it could be ok, knind of expensive option though I would think.
Amortise the cheap battery power cost plus a new battery every 6 months for 5 years against the price of that widget.
PBFoot.
Helmets on push bikes? When I was growing up we just used our head.
Always wear a condom over your barrel when its wet. It stops rust.
