A device that transfers power to smartphones, tablets and myriad portable devices. USB chargers plug into an AC outlet and provide a USB Type A or Type C socket to cable DC power to the device. At the ...

The first USB power specification. Introduced in 2007, USB Battery Charging was fixed at 7.5 watts, 5 volts and 1.5 amps. When Version 1.2 was introduced in 2010, the following terms were coined to ...