I've been looking into the Emcotec to install in my 2.6 Composite ARF Yak. It appears that the batteries can be charged via the switch per the info below:



The high power switches present an alternative to the traditional on/off switches. Two different versions enable it to be used as an on/off switch for the receiver station (JR version with UNI connections) or, for example, for igniting gasoline engines (MPX version with multiplex high-current plugs). The switches are available in four different colors (black, white, red, and blue). An additional integrated charging cable allows the connected battery to be charged without unplugging it. The charging cable/battery connection is only activated when the pin plug is plugged into the out socket. In switched-on mode (pin plug in the "on" socket), the charging cable is deactivated and separated from the battery. An ultra-bright red LED in the middle of the switch signals the switched-on mode.