I just wanted to give people a heads up to select a good quality USB charger for the RS2.
I picked up a 5V/2A charger and it was getting hot so I checked the load. It turns out the RS2 will pull a little more than 2A and then the charger drops to 4.5V and the load rises to 2.5A and the heat begins.
I will replace the charger with a 3A rated block now as I don’t want to risk a fire. Check yours if you notice it warmer than usual.