Since this is sort of on the topic, let me ask, for those who might know, what is the best way to get a canister light through? I have one that I would like to take with me on some live aboard trips this summer for night diving. What is the best way to get it through security with the least amount of trouble. I know the NIMH battery will have to be in the checked luggage (considered Haz Mat). Is it best to leave it all together with instruction book & all or to split it up between bags (which could be a real mess if the ask to see it assembled & working)? Can the canister lid & light itself be carried on While the battery & canister be checked (the most sensitive part)? Where would be the best place to seek correct information about this? I realize with clumped batteries, wires, cords, ballast & switches, it could look quite suspicious to scanners & going through an X-ray. I don't particularly want to obviously mark my bags as "expensive Scuba gear" for the airline scavengers who like to help themselves to whatever they may find in the bags.