CSE New Replacement Laptop Battery for HP EliteBook 6530 6930p EliteBook 8440p EliteBook 8440w ProBook 6440b ProBook 6445b ProBook 6540b ProBook 6545b HP COMPAQBusiness Notebook 6530b Business Notebook 6535b Business Notebook 6730b Business Notebook 6735b 6 cell 5200 mhA Battery type: Li-ion; Capacity: 5200mAh/56WH; Cells: 6-cell; Voltage: 10.8V. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support,12-month hassle-free warranty. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Operation time: the actual operation time will depend on how much electricity is required by the device and how you use it.