If you're not an HP laptop user, you must confirm that the laptop charger is compatible with your computer, because it may not be suitable in terms of voltage, output current, etc.
All power cords are hidden inside the compartments of the backpack where you store your devices. The charging cable has its own separate pocket on the side of the backpack, so it doesn't take up any space inside. Furthermore, all cords are retractable, so you can use your phone while its charging and then easily put the cable back inside the backpack.