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.

Best of all, it's not all that expensive, with a retail price that comes in at just $40. Luckily, you can now score a discount that knocks 20% off thanks to a digital coupon on Am ...

A power supply for electronic devices. Also called an "AC adapter" or "charger," power adapters plug into a wall outlet and convert AC to a single DC voltage. Computers use multiple DC voltages ...