I fly electric radio controled airplanes. The smart charger of choice (cheap & cheerful) is the Thunder AC6. We use it to charge our Tetrix batteries. It comes with a Tamiya connector. Being smart it tells you how much charge it takes to bring your batteries back to full. It has a Nimh setting we manually set to 900 mah max. Good news it's on sale now for $43. Here's a link
http://www.hobbypartz.com/thac6smbachw.html