Normall AA is Nickel Metal Hydride or Alkaline cell inside, the "own type of battery" is mostly Lithium cell inside. Technically speaking, Lithium is much better than NiMH or Alkaline, can last longer.
wow.. i would have thought there would be more people who would vote for normal batteries.. how bout in the long run? which one would have longer batt life say after a few years? The cost of changing normal batts would be cheaper wouldn't it?