A vintage Ray-O-Vac battery; the 'o' in Ray-O-Vac has been replaced with a demonic hellmouth cropped from an medieval manuscript. From the top of the battery, a giant mushroom cloud emerges, against a starry backdrop.
https://static.mamot.fr/media_attachments/files/113/600/220/064/198/393/original/c2700158cd90333f.jpg