Since I only found out about this because I'm subscribed to the RSS feed from dpreview.com , I figured I should pass it along. Apologies if your standard news source has already warned you: US Department of Transport announces restrictions for Li-Ion batteries Travel Alert Starting January 1, 2008 Spare Lithium Batteries No Longer Allowed in Checked Baggage. From what I can tell, here is how it affects me: -I can not put my spare batteries in my checked luggage, especially since I'm not going to check the equipment that uses the batteries. -I need to check if the batteries I'm using are quantity limited, if they are, my travel companion gets to carry a few. -Each battery will be carried in its own plastic zip-top bag. -I'm going to follow the carriage rules for other types of rechargeable batteries as if they were Lithium, to avoid harried baggage checkers pitching innocent batteries. If a few plastic bags save me a few minutes of grief in the security line, I think i...