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 ...

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).

A series of universal-input ac/dc wall-plug adapters is available with a variety of plugs and cord lengths; provides from 3 to 48 V in versions from 4 to 6 W or 12 to 15 W; operates at temperatures up ...