It is a kind of battery of macbook. It has good performance. We have different specifications. Compatible with Apple Laptop battery part numbers: A1175 MA348G-A MA463LL-A MA464LL-A MA600LL-A MA601LL MA466LL-A MA681LL-A, Apple MA348J-AFits these Apple laptops: Apple MacBook Pro 15 Inch, Apple MacBook Pro 15.4 inch, Apple MA348G-A, Apple MA348 laptop battery. Any numbers you need , we will try best to supply for you