This 4320t battery is compatible with following part numbers:

FOR HP

587706-751 587706-761 593572-001

593573-001 BQ350AA HSTNN-CB1A

HSTNN-CBOX HSTNN-DB1A HSTNN-Q78C

HSTNN-Q78C-3 HSTNN-Q78C-4 HSTNN-Q81C

HSTNN-UB1A HSTNN-W79C-5 PH06

FOR HP COMPAQ

587706-761 HSTNN-CB1A HSTNN-CBOX HSTNN-DB1A HSTNN-I85C-3

HSTNN-I85C-4 HSTNN-I85C-5 HSTNN-I86C-3 HSTNN-I86C-4 HSTNN-I86C-5

HSTNN-IB1A HSTNN-LB1A HSTNN-Q78C HSTNN-Q78C-4 HSTNN-Q81C

HSTNN-Q81C-3 HSTNN-Q81C-4 HSTNN-UB1A HSTNN-W79C-5 HSTNN-W79C-7

HSTNN-W80C

This 4320t battery is compatible with following models:

FOR COMPAQ

320 321

325 326

420 421

620 621

FOR HP

420 425 4320t 620

625 ProBook 4320s ProBook 4321S ProBook 4325s

ProBook 4326s ProBook 4420s ProBook 4421s ProBook 4425s

ProBook 4520s ProBook 4525s ProBook 4720s