On a drizzley morning, Miss Monochrome wakes up in her four and a half tatami-mat sized apartment. When she tries to change her battery, a leak in her roof causes her battery box to explode. What should appear from the smoke of the explosion but a good-looking guy in the form of a battery! Miss Monochrome and Battery-kun are shocked by this destined encounter. Thus begins their days of friendship.
I'll change your batteries for you.
سأبدِّلُ بطّارياتكِ
Ich werde deine Batterien wechseln.
Ya cambiaré tu batería.
Te cambiaré la batería.
On va changer ta pile,
ne t’inquiète pas.
Cambierò le pile per te.
Vou trocar suas baterias.