The Asus EEE PC 1015PN uses an AC adapter that has the following specs.
***Input***: 100-240V (Worldwide) [br]
***Output***: 19V 2.1A [br]
***Power***: 40W
I was able to find a replacement charger [link|https://www.nextdaypower.com/Asus-Eee-PC-1015PN-AC-Adapter-Charger-Power-Supply-Cord.htm|here|new_window=true], but I always recommend shopping around because you might find it cheaper on eBay.