, the reality is far less exciting than the idea. When pouring lemon juice on a dead battery, the citric acid comes into contact with metallic components such as zinc and manganese dioxide.
This chemical reaction doesn’t revitalize the electrochemical reactions essential to the battery’s proper functioning. In fact, lemon juice generally causes accelerated corrosion of internal components. It’s a bit like applying salt water to rusty metal: it only worsens the deterioration.
Rather than reviving the battery, this experiment risks irreversibly damaging its internal components. The acid in the lemon quickly attacks the metals present, causing potentially dangerous chemicals to leak out. These chemicals can damage the battery itself, as well as the surface it sits on.
