Gwyn wrote:
Flying to Norway I had to take my camera, all my lenses and my spare lithium batteries out of their bag and put them through security separately.
First time I've had to take everything out, but the spare batteries regularly get checked to make sure they are packed properly and can't short. Mine are in two 3-d printed holders and absolutely as safe as they can be.
You are not allowed lithium batteries in hold luggage either.

Since much post is flown around nowadays I can understand the concerns about lithium batteries being unmarked in a package.
SRS stuck a label on the package to me stating it contained lithium batteries.