The Acer PA-1650-86AW is a 65 W AC adapter for notebook computers, providing external power to a notebook designed for this model. Lite-On specifies it as a single-output power supply for notebook products.
Its DC output is rated at 19 V and 3.42 A. The grounded, three-pin input describes its mains connection, while the output ratings identify the power supplied to the notebook.
This exact model’s output and input configuration help identify it when checking whether it suits a notebook. It is intended for notebook use, rather than a general-purpose power supply.