Note: Please make sure your laptop can accept the power source and the correct volt, otherwise it will be damaged your laptop.
DC 7.9 * 5.4 mm Jack to DC 4.8 * 1.7 mm Power Adapter For Laptop
The Power adapter cable for DC 4.8 * 1.7MM enables the laptop to be used with DC 7.9 * 5.4MM the Adapter.
DC Jack: 7.9 * 5.4 mm
DC Plug: 4.8 * 1.7 mm