Not much of a difference between Energizer, Duracell, and Rayovac, You should be able to stop at a Wal Wart and pick up, probably around the photo center, an Energizer or Duracell charger that comes with 2 batteries for $10, or one that comes with 4 for $15.
They'll also have Kodak ones, but stay away from the Kodak batteries, also stay away from Samsung, Eveready, Fuji, "value batteries" and Store brands