@metaphantom, Welcome to the HP Support Community!
This model Notebook supports a 200 W AC power adapter and has a 4-cell, 70 Wh Li-ion polymer battery. Yes, you may connect the charger to an extension/surge protector. However, HP recommends connecting it directly to the wall outlet.
Hope this helps! Keep me posted.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!
Have a great day!
KUMAR0307
I am an HP Employee