I recently purchased two batteries for my Slash...a 2S 5000 Mah and 3S 5000 Mah LIPO.

I'm traveling on a commercial airline and taking my truck and hopefully the batteries with me on board.

Due to the safety issues on aircraft (laptop fires, etc)...FAA put out specific guidance. Only two spare batteries of LIPO nature.

They list the max weight as 25 grams of LIPO material.

An extended use battery for a laptop is acceptable (the one I'm typing on is Lithium Ion with nearly 9000 Mah rating).

http://www.faa.gov/about/office_org/..._batteries.pdf

So my question is: are these batteries safe for airline travel? How do I describe the size as being less than 25 grams of LIPO material...when obviously they weigh in their entirety nearly 400 grams?

Thanks

Tim