Dentsing New MR90Y for Dell Inspiron 15R-5521 3521 Battery MR90Y 65Wh 11.1v Model: MR90Y Color:Black Voltage:11.1V Capacity:5640mA/65Wh Compatible P/N:MR90Y XCMRD 68DTP G35K4 Compatible with:Dell Inspiron 3521 3537 14R (5421 5437) 15R (3521) 17R (5521 5537) Latitude 3440 3540 Vostro 2421 2521 6 Months Warranty. If you have any issue, please contact us, we will help you resolve it before you leave a negative feedback or low review.Thanks for your kind support and patience.