Specification: Battery type: Li-ion Voltage: 14.8V(Compatible with 14.4V) Capacity: 4400mAh/65Wh Cell:8 Cells recharge cycles: 500 Operation time: Around 2.5-3.5hours Replace Part Number: 707614-121 707614-141 707615-141 AR08XL HSTNN-IB4H HSTNN-IB4I 1588-3003 Fit : For HP ZBook 17 Mobile Workstation Series For HP ZBook 17 Series For HP ZBook 17 G1 Series For HP ZBook 17 G2 Series For HP ZBook 15 Mobile Workstation Series.