Laptop Adapters

Swapping power supplies

It can be kind of complicated and confusing if you’re not familiar with how a power supply (and to some degree, electricity itself) works.

The short rules boil down to this:

  • The output connector must match.
  • The polarity of the output connector must match.
  • The output voltage must be the same.

In addition,

  • The output amperage must be greater than or equal to that required by the laptop.

or:

  • The output wattage must be greater than or equal to that required by the laptop.

Source: Can I Use a Power Supply with a Higher Wattage Rating on my Laptop? – Ask Leo!