Anker&reg; New Laptop Battery for HP Presario A900 A910 C700 C714nr C769us F500 F557us F558us F560 F572us F577 F577Cl F579wm F588 F700 F730 F735 F739 F730us F739wm F750 F750us F756nr F763nr , also fits 446506-001441425-001 ev089aa ev088aa - 18 Months Warranty [Li-ion 6-cell 4400mAh] Battery type: Li-ion; Capacity: 4400mAh; 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, 8-hr x 5-weekday call support, 18-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 for standard battery(6-cell, 4400mah): 2-3 hours; for extended battery(12-cell, 8800mah): over 4 hours (Note: The actual operation time depends on how much electricity is required by the device and how you use the battery.)