Battery Acid

Battery leakage questions?

Let’s power through some answers.

What is battery acid?

Battery leakage (commonly known as battery acid) is nasty, corrosive stuff – it can burn your skin, contaminate soil, and of course ruin whatever device it has leaked into. For household batteries, this “acid” is actually alkaline – thanks to the potassium hydroxide chemical make-up. For lead batteries, sulfuric acid is the dangerous residue, which requires a different type of clean-up.

How do I clean an alkaline battery leak?

Leakage from an alkaline battery is caustic and handling should be avoided to prevent chemical burns. If attempting to clean battery leakage from a device, proper safety equipment would be advised (i.e., protective eye wear, gloves, etc.). The leaking batteries should be removed from the device and placed in a plastic bag for disposal in the trash. The best way to remove alkaline leakage from the device is to neutralize by carefully dabbing with a few drops of a mild acid like white vinegar or lemon juice. For stubborn leaks, an old toothbrush dipped in vinegar or lemon juice gets the job done. After the leakage has been neutralized (fizzing stops), carefully dry the area. After the area has dried thoroughly, the metal device contacts can be scraped to remove any residue and then polished using a pencil eraser.

Energizer has made improvements in our battery construction in recent years to help prevent alkaline leakage issues. This Powerseal Technology has reduced the occurrence of leakage in our alkaline batteries, and we stand behind them with our No-Leak Guarantee on some Energizer® Batteries.