you want a TLP... get the best from TLP which is the TLP TL-15 most of the people that I know uses it, including me and if they are not using this one they have the Systema LCD version. I charge anything, actually I recondition my car battery last month with it...a little complicated at first but once you know how to use it, you are good to go... In Canada this charger is almost 200$ at some places, but there are alot cheaper places in the US or in Hong Kong... here's a link to one the retailers that sells it...88$ sounds resonable for it...but shop around you might able to get it cheaper...
http://www.cobraairsoft.com/product_...4754856b20a1aa