[sanddrag]

In 2010 I flew two batteries in a box made of birch plywood with a handle and had it clearly labeled on the outside. It drew the attention of the airline to such an extent that I heard my name called over the airport loudspeaker, and was greeted by the pilot himself when I arrived at the gate. After explaining exactly what it was, and that the batteries were identical to those used in wheelchairs, it was allowed to fly. In 2008, I flew several batteries to Hawaii packed well inside plastic crates with tools and whatnot. Not even a second look. It seems to be rather hit or miss. In any case, make sure you insulate them well. If a robot battery were to set fire to a commercial airline, that would be the last of anyone ever flying those.