Electric current in Brazil varies widely—from 100 to 127 volts or 220 to 240 volts and from 50 to 60Hz—even within the same city, building, apartment or office. Be aware before you plug in any electrical device. Some cities in Brazil only use 220 volts. While many hotels clearly label electrical outlets, others don’t. If you’re in doubt, ask first. Check the power adapters of you laptop, battery chargers and other electric appliances before you go. Many are designed to automatically accommodate input current from 110 to 250 volts while others are only for 110. Some are switchable and others not. If you have something that only accepts 110 volts, you may want to consider purchasing a voltage adapter before you travel. Also be aware that many electrical outlets in Brazil that will only accept a standard Brazilian two round prong plug. You may need a plug adapter.
While many electrical outlets in hotels and newer buildings in Brazil will accept the normal, two flat pronged plug used in the North America, you will most likely encounter some electrical outlets that will only accept a Brazilian two round prong plug. Adapters to covert your two flat pronged North American plug to a Brazilian two round prong plug are readily available and inexpensive. Most hardware stores and supermercados (supermarkets) in Brazil carry these plug adapters. If you are traveling from Europe or elsewhere (other than North America) and use a different type of plug, it may be best to purchase an adapter before you leave home.