Dr Laptop 6-Cell Lithium-Ion Replacement Battery for Select Dell Inspiron / Vostro Laptops - 13R (N3010) / 14R (N4010) / 15R (N5010) / 17R (N7010) / M5010 / N5040,Replacement part#:312-1201,9JR2H Battery type: Li-ion; Capacity: 4400mAh 49WH; 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. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Operation time for standard batteries(6-cell, 4400mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it.