Please do not short-circuit the positive and negative terminals.
(a) Every terminal does not touch any other terminals and battery bodies.
(b) A terminal(s) of a battery touches a terminal(s) of another battery.
(c) A terminal of a battery touches another terminal of the battery.
(d) Terminal(s) of a battery touches a body of another battery.
Please keep the state of (a) when UMAC is packaged to avoid short-circuit.