pic: I Love UPS!

[KenWittlief]

something that a lot of people miss

when you have to ship something solid (like the batteries) its best to cut the box down so its the same size as its contents. If the sides of the box are bigger than the contents fill it with something solid, like panels of cardboard.

That box looks like it could not support another box just like it. They do not ship boxes like this one high on a truck, or on an aircraft. They need to be able to support other boxes.

Its easy to cut boxes down - you cut the four corners lower between the flaps, and then fold and crease new edges, so the flaps fold in further.