240W Dell Laptop Charger Power Supply Adapter for Dell Alienware 13 15 17 M15 M17 M17X R2 R3 M18X X51 Precision 7710 7720 7730 7510 7520 7530 Dell G3 G5 G7 M4700 M6400 M6500 M6600 J211H 7.4 5mm