Everything is fine.. The battery doesn't rotate left or right, it is stable. There seems to be a joint in its body.. it consists of two parts, the body and then tightening, they don't move. Because it is square-shaped, it constantly collects splashes on the top, which turn into salts when evaporated.. And it is black, so acidic cleaners are not allowed (vinegar, etc). However, the recommended green soap removes it if you leave it for a while!