The battery is a great battery. But I had to pay Best Buy to do a software install on it because it came with a software cd programed in another countries version of software. My anti virus that I bought from Best Buy thought the cd had malware on it. The reason it came with a cd is to up date the Bios on Sony computers so it will recognize the aftermarket battery. Its pretty sad when a person cannot buy a product in their own country and receive the correct version of software.