Dell YCD1H is an external AC adapter for powering and charging compatible Dell laptops. It delivers 65 W at 19.5 V and 3.34 A, for systems specified for this output.
The output connector is a 3-pin, 7.4 mm type, and the mains connection is C6. Check that these connectors match your laptop and power connection.
Use it to power a compatible laptop while working and recharge its battery. The specifications do not identify compatible laptop models.