Can you prove that? Or are you just saying it for effect. 1) Same factory and equipment used, condition of the equipment was the same, 2) Same staff or people manning the factory, 3) Same conditions, 4) Same quality control. All these things are important in manufacturing. How can we know either way, really. With computers (ie. HP vs. a cheap brand) we can easily take them apart and figure out the OEMs. It can be easily demonstrated that the two are equivelent, or that they aren't. But how can we do that with batteries?