firefly99,
I believe I have seen draft standards by DOT and the FAA that will limit Li metal batteries (such as the CR123) on passenger aircraft, due to two different incidents. My memory is not the best, but I thought they would allow batteries in the device, but no spares in your carry on or baggage. Although TSA will be asked to enforce any new travel restrictions, the restrictions will come from DOT and/or the FAA.

Since I fly a lot, I have switched to AA flashlights, etc. I also use Eneloops with great success. After market chargers are much easier on the cells, providing longer cycle life.

Spud