Scroll down an look for Orbit Microlader or Orbit Pocketlader. http://www.helihobby.com/html/chargers.html
Very good chargers. They have Reflex charging for NiCd and NiMh. It's something like feeddack. The charger wathces over the battery and adjusts the charging voltage and current. A friend charges his 3600 NiMh rx pack with 6 amps. 1/2h and it's full.