Original Model Number 587706-121, 587706-751, 587706-761, 593572-001, BQ350AA, HP PH06, HP4520BAT, HSTNN-CB1A, HSTNN-CB1B, HSTNN-CBOX, HSTNN-DB1A, HSTNN-I85C-3, HSTNN-I85C-4, HSTNN-I85C-5, HSTNN-I86C-3, HSTNN-I86C-4, HSTNN-I86C-5, HSTNN-I86C4, HSTNN-IB1A, HSTNN-IB1A, HSTNN-LB1A, HSTNN-Q78C, HSTNN-Q78C-3, HSTNN-Q78C-4, HSTNN-Q81C, HSTNN-Q81C-3, HSTNN-Q81C-4, HSTNN-UB1A, HSTNN-W79C-5, HSTNN-W79C-7, HSTNN-W80C, PH06, HSTNN-YB1A, 584054-001 Suitable Model Compaq 320, 321, 325, 326, 420, 421, 425, 620, 621, 625 HP 320, 321, 325, 326, 420, 420, 421, 425, 4320T, 620, 621, 625 HP ProBook 4320s, 4320t, 4321s, 4325s, 4326s, 4420s, 4421s, 4425s, 4520s, 4525s What's in the box 1 X Battery