Easy Style 65W PA-2E PA12 PA-12 Ac Adapter Charger Battery for Dell Latitude D520 D531 D600 D610 D620 D630 D800 Power Supply Cord Output Voltage: 19.5 V 3.33A Power: 65W Max, 3 Prong Power Cord for Dell Laptop Charger D410 D420 D430 D500 D505 D510 D520 D530 D531 D600 D610 D620 D630 D800 D810 D820 D830; Dell Inspiron 15 3520 3521 3531 3541 3542 3543 3537 7537 5545 5547 5548 15R 5537 5520 5521 7520Dell Latitude 5480 5490 5590 7280 7480 7490 Connector size: interior diameter: 5.0mm; external diameter: 7.4mm Notice:this is ROUND NOT OCTOGONAL connection Item Includes: AC Adapter and Power Cord Warranty: 12 months warranty . 30 days money return guarantee