To add some info in favor of the RC Discharger, you do not need to buy a separate power supply if using an RC Discharger with an ICharger.

An ICharger has proven its worth for a very long time. When you add everything up, starting from scratch, the RC Discharger is not that much more than an ICharger+Power Supply+Discharger.

Also with the RC Discharger, you can still use both channels at the same time which is invaluable if running multiple classes.