Battery Type: Li-ion (Lithium-Ion)
Battery Voltage: 11.1V
Battery Capacity: 2400mAh / 3400mAh / 4400mAh (depending on version)
Number of Cells: 3 cells / 4 cells / 6 cells (depending on capacity)
Battery Color: Black
Compatible Models: HP ProBook 640 G1
Replacement Part Numbers: HSTNN-IB42, HSTNN-DB42, 693709-001, 693713-001