Now, you can use single DC power supply of 18.5 volts for all HP laptops by adding a 330K ohm resistance instead of extrs 5 volts. You can review the given pictures for your assistance. We have guided you through them. Like this, you can also use the acer, toshiba, asus or samsung charger of 18.5 volts or 19 volts by attaching the extra resistance to it, as required.
