That's a pretty sensible bit of gear to carry Tipsy. Having a battery die suddenly on a ride out in the Never Never would be 'inconvenient', to say the least.
I don't want to be rude, but having met you today at Esk, and cast an eye over your ST, with all the great gadgetry, I wonder why you weren't nick named Inspecta Gadget?
:) Just a thought.