Hello, can you tell me what battery I need to get to replace the current (no pun) one in my 15" MBP from 2006, serial number W86370USVWW? Thanks very much! I'm pretty sure there aren't many types of battery, but just being on the safe side. The battery was pretty good but has recently suddenly dropped down to 1hr before it needs charging again (522 cycles, 45%, according to istat). I know 2006 is like the early Cretaceous on here, but this MBP's really been great and still going strong apart from this.