HP 593572001 Battery Primary 6cell lithiumion LiIon 22Ah 47Wh
List of compatible models includes: 421 T6670 14.0 2GB/320 GRY PC, 4320s i3-370M 13.3 4GB/500 BLK PC, 4320s i5-480M 13.3 3GB/500 BLK PC, 4321s i3-370M 13.3 2GB/320 BLK PC, 4321s i5-450M 13.3 2GB/320 BLK PC, 4321s i5-560M 13.3 2GB/500 BLK PC, 4420s i3-370M 14.0 2GB/500 BLK PC, 4420s i3-390M 14.0 2GB/320 BLK PC, 4420s i5-460M 14.0 4GB/250 BLK PC, 4420s i5-560M 14.0 3GB/500 BLK PC, 4421s i5-450M 14 2GB/500 BLK NB PC, 4421s i5-580M 14.0 4GB/500 BLK PC, 620 T3100 15.6 3GB/500 GRY SEA PC, 620 T6670 15.6 4GB/500 GRY PC, ProBook 4320s i5-520M 320GB Win7P PC, ProBook 4321s Notebook PC, ProBook 4326s P340 13.3 2GB/500 PC, ProBook 4420s i335M 14 2G/320 BLK PC, ProBook 4420s Win7 PRO i3-330M 250GB, ProBook 4425s P360 14 2GB/320 BLK PC, Promo 4420s i3-380M 320/2GB BLK PC LI-ION 6CELL BATTERY