CSEXCEL New Laptop Replacement Battery for Sony SR Series VAIO FW VGP-BPS13 series VGP-BPS13/Q VGP-BPS13A/Q VGP-BPS13B/Q VGP-BPL13 VGP-BPS13A/B VGP-BPS21B Laptop Notebook Computer Battery type: Li-ion; Capacity: 5200mAh/58WH; Cells: 6-cell; Voltage: 11.1V. 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.