DOT's rule on lithium batteries in air travel, which took effect on January 1, 2008, prohibits carriage of spare lithium batteries in checked baggage, such as large suitcases you hand over to the airline for handling. If you put a portable electronic device in checked baggage, you may still do so with the batteries installed in the device.
In carry-on baggage, you may still carry any number of some types of lithium batteries, such as the ones used in cell phones and most laptop computers, provided you take measures to protect terminals. You may also carry up to two more powerful batteries, within the limits described here.
In September 2006, the Transportation Security Administration (TSA) adjusted its airport security screening procedures as follows:
1) Pre-Screening - Passengers may carry travel-size toiletries 
(3 ounce or less) that fit comfortably in ONE quart-size, clear plastic, zip-top bag through the security checkpoints.
2) Post-Screening - Passengers may bring items, including beverages and duty-free items, purchased in the secure gate area on-board the aircraft.
*Please note that not all airports offer the one quart zip-lock bags and you should always be prepared by bringin your own bag. As of November 2007, security agents are still removing and throwing out any liquid articles that you try to carry on and do not fit inside your checked baggage. Also you can find 3 ounce bottles of contact lense solution at Target stores. Most solutions are in four ounce bottles.
According to the Department of Homeland Security (DHS), the U.S. is working to align its policies with those found in Canada and Europe, but some differences may currently exist. As more details are released, ASTA will provide updates. Details can be found at www.tsa.gov/press/happenings/925_updated_passenger_guidance.shtm
For more information on delays and security alerts for travel in the US and International travel go to:
