Hi Fraser, i haven't waited for it to time out to be fair. I go to my computer, turn on the VPN via DumaOS, do what i need to do then when i return its disconnected and sometimes (rarely) the script, username and password has scuttled off somewhere. One of AirVPN's selling points is that there is no time limit so i don't think its disconnecting their end due to inactivity? I will try another script from AirVPN and let you know.
Cheers