I have tried many chargers throughout my years of racing. Before buying the Cell Masters I had a Turbo 35 GFX. I sold thre Turbo 35 GFX and bought Cell Masters instead because the batteries came off the charger cooler and felt better on the track. I have also tried the Duratrax ICE I say hands down if you are a racer Cell Master are the way to go.
I was also at Reedy Race of Champions in 2005 with Team Much More and Masami asked to use one and he stopped dumping after the switch.