So, as previously mentioned: 1) the battery recharge plate. >>> Too mundane to devote a whole 30 seconds to without further exploration later, but I can't think of what that might be. Maybe finding a stash of Ancient tech that doesn't work until they recharge it... (lame I know but grasping here..)
I suspect that was just a method of the writers explaining why the SGU teams torches and radio's never run out of power. Nothing more, nothing less... It might be used again, it might not.