As i dont have either of the above chargers. I currently own a Imax B5 , a Imax B6 and a Prolux 2. They all have the same buttons and screen so i thought i`d try the method of checking with one of my 3 cell lipos.
Only the Imax B6 worked and it was spot on with the voltage. Already been set at +4. Prob from factory as its new when i bought it.
So there you go guys another charger which will do that. The Imax B6