NOTE: Please check carefully about your laptop model name/battery part number/battery shape and size to make sure you purchase the correct battery. Specification: Battery type: Li-ion Voltage: 11.4V Capacity:56Wh Cell:6 Cells recharge cycles: 500 Operation time: Around 1-3.5hours Compatible Part Number: PK03XL 788237-2C1 789116-005 HSTNN-DB6S TPN-Q157 Fit with: For HP Spectre X360 13-4000, 13-4100 13-4200 Compatible model: For HP Spectre Pro X360 Spectre 13 Series.