i'm thinking of buying a "recycled" "Grade A" battery for my Macbook. Does anyone know what it means for a Macbook battery to be "recycled" and does anyone know how reliable a thing like this is? It seems like a very credible website and it is offering 3 plus hours of battery time and a 6 month waranty. And best of all it is less than half the price of a new on. Any suggestions? Anyone ever bought one?