Battery positive pole touches water
240KW/400KW industrial rooftop - commercial rooftop - home rooftop, solar power generation system.
The button battery marked with "+" is the positive pole, and the back is the negative pole; The shell at the edge of the button battery is also positive, so most button batteries loaded on the button battery base are positive upward, because there are metal shrapnel at the side end of the button battery base to prevent the button battery from falling out.