TECSUN R9012.

This is one of the best "bang for buck" portable radios that you can get today. It doesn't have all the fancy features that some of its contemporaries have but it makes up for it by only using 2 AA batteries.

Since it's as basic as radios go, it also means that any battery that you put in it will go a long way. I've been running my R9012 on a couple of cheap batteries and it's still perfectly fine after a month of intermittent running.