We will be staying in Buenos Aires and Santiago, before and after our cruise next month. Do we need to bring an electricity converter (as we need to do in Europe) with us to use our chargers for our cell phone and camera batteries
Some of the hotels have a 110 volt outlet in the bathroom. Also many appliances will automatically adapt. For example, both my computer and battery charger will automatically adapt to differences in voltage and all I ever carry are plug adaptors.
Definitly both countries are 220v. I know because I live in Montevideo, Uruguay. In the neighborhood let's say. If I were you I'd bring a converter. They are not that heavy and you could avoid a problem.