lithium batteries

I am getting ready for a trip to Cozumel. I have two new dive lights which both use lithium batteries. For airline travel (Delta) should they be packed in checked baggage or carry-on? I got different answers when I asked recently at the airport. Thanks,

Either way. I do both, and have had no problems.

I am getting ready for a trip to Cozumel. I have two new dive lights which both use lithium batteries. For airline travel (Delta) should they be packed in checked baggage or carry-on? I got different answers when I asked recently at the airport. Thanks,

I always take batteries with me on the plane. Even the battery for my Sierra Scooter was not a problem.