Not sure where you heard this, but not as cargo. These batteries are Cargo Aircraft Only (CAO). As a cargo pilot, I am expendable and can carry these by the thousands on my 747, but not allowed on passenger planes. BTW, two Boeing 747-400's (UPS and Asiana) have been lost due to battery fires in the cargo compartment. We figure we have 17 minutes to get it on the ground, or in the ocean. This is about the only situation, where I would be putting a four engine plane in the water.