EC TECHNOLOGY&reg; Brand New Extended Replacement Laptop Notebook 6-cell Li-ion 4400mAh Battery For Dell Inspiron 15R N5110 N5010D-148 N5010D-168 N5010 N5010D-148 N5010D-168 N5010D-258 N5010D-278 5010-D330 5010-D370HK 5010-D382 5010-D430 5010-D460HK 5010-D480 5010-D481 5010-D520, 14R N4110 N4010 N4010D N4010D-158 N4010D158 N4010D-158 N4010D-248 N4010D-258, 17R N7110 N7010 N7010R N7010D, 13R N3010 N3010D N3010D-148 N3010D-168 N3010D-178 N3010D-248 N3010D-268 3010-D330 3010-D370HK 3010-D370TW 3010-D381 3010-D430 3010-D460HK 3010-D460TW 3010-D480 3010-D52 3010-D621, M501 M501R M5010 M5010R M501D M5110 M5030 M5030R M411R M511R M4110, Dell Vostro 3450 3550 3550N 3750 - 12-Month Warranty Battery type: Li-ion; Cells: 6-cell; Capacity: 4400mAh; Voltage: 11.1V. Built with premium materials and undergoing strict QC process, circuit protection ensures both safety and stability. Grade A cells ensure fast charges and low power consumption, Up to 500 recharge cycles over the life of the battery. Operation time for standard batteries(6-cell, 4400mah): 2-3 hours; for extended batteries(12-cell, 8800mah): over 4 hours (Note: The actual operation time will depend on how much electricity is required by the device and how do you use it.) CE-/ FCC-/ RoHS-Certified for safety, 12-month hassle-free warranty.