I use the same charger and I've used for about half a year now. Its a great charger. Ya I've used NiMh batteries. The more amps you charge them at the more punch you get. The lower the amps the longer run time but not as much punch. You can still charge those batteries but you just might not have the full amout of power. I have the charger just because of the price. If I were you i would try to get a LRP Pulsar sport or competition 2. Those are other good chargers for its price.
"Nobody does it better"
"Supplying all your r/c racing needs"