If you rent an apartment here, one of the things you will quickly discover is the Italian mode of home electricity. You’ll probably want to plug in your computer right away or charge up your cell phone. You’ll find that you need to buy an adapter that will allow the flat-bladed American electrical plug connectors to be put into the round Italian ones. But before you plug anything in, you need to read that little notice on the back of your particular appliance that you never paid any attention to before. It will tell you the limits of your appliance’s voltage. The first thing you need to know about Italian electricity is that it runs on 220 volts as opposed to the American system which runs on 110.