An curved arrow pointing right. Have you ever looked at your iPhone cable and then looked at your computer charger and thought, "why does one of these have 2 prongs, but the other one has 3?" ...

If you have an older home, you may have outlets with slots for two prongs instead of three. The list of electrical outlets most commonly found in a modern house doesn't include two-prong outlets ...

You can use the USB ports in addition to two- and three-prong power plugs. Lastly, the outlet's built-in USB charger may not fit in shallow electrical boxes, so confirm that it's compatible by ...