I am travelling to Argentina in a few weeks and am wondering if I will be able to use my electrical devises?

I will be staying in Buenos Aires for two weeks. Do I need some kind of an adapter to plug in my lap top ect? If so where can I get one?

Argentina has 220V. Most devices like lap-tops, camcorders, etc. can work either with 220V or 110V, all you would need is an adapter since the plugs will have a different shape. The adapters are cheap, about $1 and you will be able to find those relatively easy. If you stay in a hotel they will likely give it to you.
Other devices may need a transformer and that may be a little more complicated. Normally in the back of all electric devices it says if it works in 110V, 220V or either one. If you need a transformer, you will find it more easily over there than in the US.

Buy an adaptor once you get there as buildings use a mixture of plug fittings.

from wikitravel: http://wikitravel.org/en/Argentina

Argentine electricity is officially 220V 50Hz, with slanted plugs similar to those used in Australia. Adapters and transformers for European and North American equipment are readily available.

The best way to use imported electrical equipment in Argentina is to purchase an adapter once there. These are available in the Florida shopping area in Buenos Aires for around US$2, or less in hardware stores outside the city center. Buildings use a mix of European and Australian plug fittings. However, the live and neutral pins in the Australian fittings are reversed so as to prevent cheap imports into Australia. Therefore an Australian adapter may be incompatible.

Many sockets have no earth pin. Laptop adapters should have little problem with this for short term use.

Argentina's outlets are their own standard, the IRAM-2073, which are physically identical to the Australian AS-3112 standard (two blades in a V-shape, with or without a third blade for ground).

Some Argentine sockets accept North American plugs, particularly ones on power strips. Beware - this does not mean that these sockets deliver 110 volts. Make sure that your equipment can handle 220 volts! Simply changing the shape of the plug with a US$2 adapter will not allow 110 volt equipment to operate on 220 volt Argentinian current; unless the device is specifically designed to work on both 110 and 220 volts, irreperable damage and even fire can result. Most laptop power adapters and many portable electronics chargers are designed to work on dual voltage; check the specifications for your equipment to be sure. If your equipment cannot accept 220 volt current, you can purchase a 220->110 volt transformer for approximately US$6 in most Argentinian electronics shops. This is much heavier and bulkier than a small adapter.

European standard CEE-7/7 "Schukostecker" or "Schuko" outlets and the non-grounded, but compatible, European CEE-7/16 "Europlug" outlets may still be found in some older buildings. U.S. and Canadian travelers may want to pack adapters for these outlets as well.

not sure.. But do go to Puerto Modero. Great food and drinks

yes you need an eletric transformer for those devices of 110 cause we have 220.
and for those who can adapt the electricity such as laptops you will need an adapter which are $5 pesos each (1,5 dollars)