International Battery Back-Up System

Hi, everyone. I am planning to buy a desktop computer, monitor and printer here in the United States. I am going to take it all to Chile and I'm trying to decide the best way to set-up everything once I get there. The power often goes out at the place where I am going in Chile, so I need a battery-back up system. However, the outlets on the walls are different in Chile.

Should I buy a converter to attach to the power cord of the battery back-up system? Would a converter be strong enough?

What do you suggest? Thanks for your help.