I can't say, this one has a 4.5 mm plug, power etc. usually fit many HP models.
usually fit many HP models. Plug size is important in my opinion. The old plugs still had
still had a ø of approx. 7 mm. Ask the manufacturer or Digitec directly...

I can't say. Look at the power data of the computer, they are written on the back. The power supply delivers a secondary DC voltage of 19.5V and a current of 3.33A. If your computer expects the same voltage and a current that does not exceed 3.33A, the power supply is powerful enough for your computer. If the plug fits as described by Racordon, nothing stands in the way of using it. Good Luck!