Yes it was the prize from the xtar 12th anniversary, and yes that is the messages from xtar.
I will try when I return from work tonight. Most of them I can rule out, springs both ends so defo makes contact, tried 4 types of batteries. The wire thing I forgot to try. Thank you for your suggestions guys.
EDIT - I tried the wire from the back of the battery to the bare threads and nothing happens, I can only presume it’s the driver. Also a friend tried the switch on a multimeter and it seems to work fine.