HP Notebook - Manual (Page 141)

Specifications
Rated Input Power
The notebook operates on DC power, which can be supplied by
an AC or a DC power source. Although the notebook can be
powered from a stand-alone DC power source,HP strongly
recommends that the notebook be powered only with an
AC adapter or DC cable supplied or approved by HP.
An AC adapter provided by HP for use with this notebook is
capable of accepting AC power within the following
specifications:
Operating voltage 18.5V DC @ 3.5A - 65W
Operating current 4.9A
This product is designed for IT power systems in Norway with
phase-to-phase voltage not exceeding 240 Vrms.
Input Power Rating
Operating voltage 100–240V AC @ 1.7A - 50–60Hz
Operating current 1.5A rms
Operating frequency range 50 to 60Hz
The notebook is capable of accepting DC power within the
following specifications:
Input Power Rating
A-2 Startup and Reference Guide––Part 2