I have the same charger and I use a common sense rc (name of the company /supplier), ultra balancer PART# UB-26.
The one thing I will note is that the molex pin connector onj the balancer does not have a fail safe for plugging in your battery. In other words, you will fry this thing if you do not make sure that the black ground wire is in pin #1. I had a battery that came with the wires backwards and because I assumed that the orientation was correct without checking. The little sucker fried in about 1/2 second!!![&o]

Michael