I recently bought a replacement laptop PC from Dell and was happy to see that its AC/DC power adapter had the same ratings as the ones I had from two now-defunct Dell laptops (19.5 V, 2.3 A/45 W).

AC/DC adapters are common types of external power supply units that are used for electronic equipment and other devices that cannot draw power directly from the main network. They change the ...

TUCSON, Ariz.--(BUSINESS WIRE)--The ac/dc adapter technology has evolved over the last years and presently the technologies developed by Rompower Energy Systems Inc. increase the efficiency from 88% ...