Laptop Battery for HP ProBook 4720s /4520/4515 1.100% compatibility . 2.High stability and safety. 3.RoHS and CE cetificate This laptop battery can also be ... , HP HSTNN-XB89, HP NBP8A157B1, HP NZ375AA This laptop battery can also fit the following laptop Models:HP ProBook 4510s, HP ProBook 4510s/CT, HP ProBook 4520s, HP ProBook 4515s, HP ...