If you leave the bass plugged in to an amp with the toggle switch set to PASSIVE, is the active side off, or will it continue to use battery juice with a cord plugged in? I would assume that it would only use the batteries if the active side is switched on, but I didn't want to assume without knowing for a fact that this was the case. I prefer to leave my bass plugged in when I am taking a break from practicing etc. with the bass switched over to passive. Thanks in advance!