Hitech - WY-105UL Smart AC/DC Charger/Discharger for Sony Duracell... AA and AAA Ni-Cd / Ni-MH Batteries Charges 2 or 4 pieces AA or AAA rechargeable Ni-Cd or Ni-MH batteries Automatic charge currect selection that automatically selects charging current for batteries Reverse polarity protection that prevents damag to the charger or batteries if inserted incorrectly Plugs directly into AC wall sockets via a foldable plug Supports universal voltage 100V-240V