Yesterday I removed the resin around the supercapacitor on my old ISS board and soldered 2 new 7.2 volts supercapacitor in paralell and now the unit is working like new and the LOW BATTERY TRANSMITTER 7
does not appear anymore on the console even without the 3 volts batter installed in the ISS.I did the same thing on my Vantage Pro2 about 4 years ago by soldering 3 supercapacitors in paralell and it has been going on since without 3 volts battery.
Reards:John