DTK New Laptop Battery for Dell Inspiron 3420 3520 N5110 N5010 N4110 N4010 N5040 N5050 N7110 N3010 M5110 M4110 M501 M503, Fits P/n J1knd 4t7jn [6-cell 5200mah/49wh] Battery type: Li-ion; Capacity: 5200mAh; Cells: 6; Voltage: 11.1V. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Brand new from Manufacturer. Up to 500 recharge cycles over the life of the battery. All DTK products are Certified by CE, FCC for safety. Strict guidelines for compatibility, and standards compliance for environment safety. Operation time for standard batteries(6-cell, 5200mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it. 24 x 7 email support, 12-month service. Compatible Models : Inspiron N3010 N3110 N4010 N4050 N4110 N5110 N5010 N5030 N5040 N5050 N7010 N7110 M5110 M5010 M4110 M501 M503 M5030 M411r M511r Series . Compatible Part Numbers : J1KND 4T7JN 312-0234 04YRJH 9T48V 383CW W7H3N 312-0233 451-11510 07XFJJ 9TCXN YXVK2 Overheating protection Overcurrent protection Overvoltage protection Overcharge protection Over discharge protection Short circuit protection Excellent discharge curve and low resistance Excellent stability Long work life More safety CE FCC ROHS PSE Brand Name: DTK Capacity: 5200mAh Cells QTY: 6 Voltage: 11.1V N.W.325g Battery Type: Li-ion ColorBlack Compatible Laptop Brand: Dell Package List: Laptop Battery + Instructions