You mean one of these fellas?
Right. There's probably no chance he will be using a power supply at the moment, so all I need is for the battery to not drain when he has the jack unplugged.
I was under the impression that those jack sockets disconnected the battery when a dc jack was inserted, so if I used one of those, wouldn't he need to have a dc jack connected in order to stop the battery draining?
If that is the case, wouldn't he be better off with the 2-pin ones? That's a bit annoying seeing as he will probably get a power supply once he gets a few more pedals.