Why Did My LR41 Button Coin Cell Battery Have a Sour Coating Nobody Mentioned?
I pulled an LR41 battery from a drawer and found a sour, sticky coating on it. That strange smell and residue made me wonder if the battery was dangerous or just old. That sour coating is actually potassium hydroxide leaking from the battery’s internal chemistry. It happens when the seal fails, and the alkaline electrolyte … Read more