"connector for the remote battery pack and the lack of keying it for polarisation"
We really do appreciate ALL feedback, let's make the best board possible! Please keep the comments and suggestions coming.
It's all good - the socket (that we will provide with each blank PCB) is polarised - we have also added a diode on the board to prevent charging of dry cells used remotely - here is a picture of the socket we intend to provide:
