I'm going to travel to Panama City ,and then to Barcelona ( Spain ), but i want to carry my macbook air in a backpack, the only thing that worries me is that my battery is damaged, i had to remove it and now my mac only works plugged in. I had read that some airlines don't let pass, through the security controls, these laptops without batteries. So , is that true? what can i do then? i really need my mac.