Is running out of battery power in the middle of a project driving you crazy? This is something you won’t have to worry about with this battery by AtBatt. This battery is precision engineered to be a reliable and high performance replacement battery for your Sony VGN-SZ55 notebook along with many other models. The ATSO36-06 is designed to replace Sony OEM part numbers VGP-BPS9 and VGP-BPL9. Now you can have the confidence to take your laptop to the local coffee shop, without worrying about finding an outlet.