Holy Bomb Batteries Batman!
Now the TSA will be on the look-out to confiscate batteries.
They most likely will. They've already prohibited bottled drinks purchased outside the terminals.
Here's something interesting... On our last flight to Vegas from KCI my carry-on was searched because I had a small 4" portable curling iron (my daughter's, long story). A friend with us found after we arrived in our Vegas hotel he inadvertently had brought 4 shot-gun shells in his carry-on. The last time he'd used that bag was on a hunting trip. KCI never questioned him. Maybe because I was in front of him and they were worried about the curling iron. I don't know. It just seems to me with all the enhanced security they would've found those shells. On the return trip he packed them in his checked baggage.