Before the 1959 Revolution, Cuba was a popular tourist destination for United States citizens, mainly due to the large number of casinos catering to gamblers put up by the American mafia. Revolutionaries claim the Batista dictatorship was a government that neglected many of its own citizens' health and welfare in order to maintain itself in power. Many Americans had beach homes during the summer, and rich American companies owned large factories and land with the cooperation of Fulgenicio Batista, the ruling military dictator. Since the Revolution, Cuba has been subjected to a trade and economic embargo by the United States. Since 2009, US citizens with relatives living in Cuba have been allowed to visit Cuba.
After 1959 Cuban tourism was mostly for Cubans only, and the facilities were not renewed until the 1990s, when Cuba lost financial backing from the defunct Soviet Union and opened its doors to foreign tourism. Now many European, Canadian, and even American visitors come to the island. In the typical tourist regions like Varadero and HolguÃn many modern 3-star to 5-star hotels are available, while in less popular tourist regions visitors are still able to rent rooms in many Cuban homes (called casas particulares).
Due to several long-standing factors (e.g. bureaucratic ineffectiveness, the U.S. embargo, lack of resources, and the loss of Soviet subsidies), much of the country's infrastructure is in need of repair. In major tourist destinations there will generally be few problems with either power or water, although such outages may occur. Electricity outages have been common in Cuba, except in tourist facilities that have a generator. 2006 was designated the Year of the Energy Revolution in Cuba, and many small generators have been installed in an attempt to avoid blackouts. Since Venezuela began providing Cuba with cheap oil and the refinery in Cienfuegos was relaunched, the energy situation has improved. Many tourist accommodations offer 220V as well as 110V power sources. This is adequate for your power needs and should be enough to accommodate anything you plug in, at least to a reasonable limit.