Thought I'd post this as lots of 3D camera travelers bring a lot of backup batteries. The airline I was on when I went to Africa had rules similar to this, but never said anything about the batteries in my carry-on, and there were a lot. But I had them in plastic bags separated for other contents. Since the Galaxy Note 7 issue, there is a lot more attention paid to batteries now, however. These are not universal rules with all airlines, so you probably need to check with the airline before going leaving the house.
No Naked Batteries in Checked Luggage
All batteries must be installed in devices if carried in luggage. No single exposed batteries can be in the luggage.
Naked Batteries in Carry-on
Naked batteries are allowed in carry-ons, however, the terminals must be protected from touching other battery terminals--use the plastic sleeve that batteries usually come in.
Some airlines want spare batteries to be packed as follows:
- The batteries are still in their retail packaging.
- The batteries each are in their own isolated container. (Such as wrapping each battery in cling wrap)
- The batteries have the connectors on either end completely covered with tape.
- The batteries are stored in a protective battery container.
The simplest solution is to get small plastic bags for each battery. Lunch snack bags (half sandwich size ) are perfect.