Hello, I'm new here, and I need help with a problem. I'm sure there is a really easy answer to this, but I don't know what it is. I can't find it googling, probably because it is so obvious to everyone else. But I have a circuit, which requires multiple batteries to opperate. Too combine their voltage, I had the negative terminal of one soldered to the positive of the next, so one and so one in a chain. Then the positive end of that chain I soldered a wire, connected it to a motor, and then through the other part of the motor, to a switch, back to the negative end of the chain. But I had found, after leaving the switch open overnight, that 5 of the 6 batteries had not voltage (according to a multimeter), did the batteries discharge each other, or do they need the circuit to be closed for that? Any help whatsoever would be very much appreciated.