Great cells. Being cylindrical, there is no need to worry about compression. However A123 has long been the target of scammers and counterfeiters. Old-Old stock, diy power-wall failures, gray-market rejects, counterfeit rewraps and all of that.
However, if your vendor is reputable, then they should be the real deal, and constructed properly and give great service. That's pretty much key with ANY battery these days.
