Exxact Parts SolutionsLaptop Replacement Battery MR90Y XCMRD for Dell Inspiron 14 14R 15 15R 17 17R 3521 5521 3721 5421 3421 5721 Battery type: Li-ion; Capacity: 5200mah /58Wh; Cells: 6-cell; Voltage: 11.1V. Quality: Grade A cells ensure fast charges and low power consumption. Protection: Built-in circuit protection, overcharge protection, over voltage protection ensures both safety and stability. Safety: Worry-free, products are passed CE-/FCC-/RoHS-Certified.1 Year Warranty Guaranteed. Origin: 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery.Please feel free to contact us if you have further questions.We will be more than happy to assist you.