I've carried my infinity ultra, I also have arc ls and AAA, in my carry on from LAX to LAPAZ, BAJA CALIFORNIA. I had the battery inside. Nobody has said anything three times.
I think the reason nobody has said anything is that they don't care. The lady behind the scanner and the three other people behind the hidden wall watching their scanners obviously saw the battery.
They know it's not a weapon. And lets face it, today, most Americans and ESPECIALLY AMERICAN GOVERNMENT OFFICIALS are CORRUPT. They give empty fancy speeches that are meaningless. What it boils down to is the ARC and Infinity are not worth it to them to STEAL from you.
I have heard of customs at the airport seizing guns and rifles used on SAFARI that were worth a lot to STEAL not to destroy. The list goes on and on, seized cars, seized anything. Not to mention CASH. If you carry a wad through the airport, you'd better be ready to part with it. Some smart *** crooked cop will probably try and intimidate you and make you feel like you're a drug dealer and try and wear a straight intimidating face till you part with it. He'll spend it all.
I had this happen to me with the Tijuana cops 5 years ago. I went down while in college with a korean classmate to the bars in Tijuana. About 5 am waiting in the line of cars at the border to come back to the US, one of three Tijuana cops standing by their patrol car in the center divider between incoming and exiting traffic from Mexico, walked up to my drivers window and stuck his revolver in my face infront of all the other drivers and asked me how much my friend and I had on us. He made us give it all to him to avoid going to prison. We didn't smoke anything or do any drugs at all. We did chase women and drink. I do feel bad for whoremongling; I won't do it again. Honest, that was all. We were down and out robbed. America seems to be going the same way as the Mexican authorities. Mexican cops make $200 a month or so. They'll stick you up for very little or just out of jealousy and hatred.
The American cops get $42000 starting right out of the academy which is paid for buy the government. Police for the airport get paid a little more. Your arc isn't worth getting fired for stealing. A lambourghini is worth it. If you're taking something politically incorrect yet legal, a savy cop might figure out you couldn't win against him and the courts would allow him to steal it from you, ie. an expensive safari rifle.
We're not lucky, just small fish.