I'm debating getting some power adapters so that I can charge my cell phone for the 6 hours plus that I will be at EZE airport. For the first three hours I'll be at a restaurant so it may be impossible to find a power outlet (Hard Rock Cafe). The last three hours I might be at the Star Alliance lounge or sitting by the gate. So I'm wondering whether it's possible to find USB power ports or if I should plan on bringing some adapters for any Argentina power outlets I can find?

I do have a power brick (battery) so I don't absolutely have to recharge, but it would be nice.