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

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 ...

Knowing this distinction matters since using an adapter to plug a three-prong device into a two-prong outlet is dangerous. If you have a few two-prong outlets and frequently use modern devices ...

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?" Well, the answer all boils down to ...