I see. Well, that makes sense. They are copies of the south african design. But now there is the question...what’s the difference between a cougar and a RG-31 charger? Maybe the “charger” is a misprint. This is what was confusing me. I found it in the wikipedia site. Go down to where it says “variants”.
http://en.wikipedia.org/wiki/RG-31
this is the same link I posted earlier.