Original Model Number 451545-261, 451545-361, 451568-001, 456623-001, 456864-001, 456865-001, 484785-001, 500014-001, 572186-001, 572189-001, GJ655AA, HSTNN-DB51, HSTNN-IB62, HSTNN-OB51, KU530AA, NBP6A73, STL-CHA-SON, HP6520BAT Suitable Model Compaq 500, 510, 511, 515, 516 HP 540, 541 Hp Business Notebook 6000, 6530s, 6720S, 6720s/CT, 6820s, 6520S, 6531s, 6535S, 6530S Hp Pavilion DV2500 DX6500 What's in the box 1 X Battery