Today at work we had to change 12 AGM batteries. They are bigger then the ones the FIRST uses but have the same design. One of the batteries had an internal problem and blew out the side wall of two cells. We had some acid come out and had to be cleaned up. I also help with an acid leak a Silicon Valley last year. Teams should keep their battery clean-up kits stocked and know how to use it. The AGM battery is much safer then old style lead acid batteries but they can still have problems.