By Maureen Wise | Updated Mar 24, 2022
Batteries are a reliable, portable source of power for everything from tools to vehicles. Most cars rely on a 12‑volt lead‑acid battery to start the engine. With the right care, you can extend its life and keep it running smoothly.
According to Battery University, the earliest known battery was uncovered in 1936 near Baghdad and dates back roughly 2,000 years. Dubbed the Parthian Battery, it consisted of a clay jar filled with vinegar and water, an iron rod, and a surrounding copper cylinder, producing about 1.1–2.0 V. The modern lead‑acid battery was invented by Gaston Planté in 1859 and has been refined ever since.
Replacing the electrolyte can revive a weak battery. A common DIY mixture uses Epsom salt (magnesium sulfate). Dissolve ten heaping tablespoons in warm (≈150 °F) distilled water and pour the solution into each cell. After adding the mixture, charge the battery overnight. Always wear safety goggles and gloves when handling batteries.
Corroded terminals can cut power flow. First disconnect the cables (negative first). Sprinkle baking soda or a small amount of soda pop over the terminals to neutralize corrosion. Scrub with a wire brush, dry with a clean cloth, and apply a light coat of petroleum jelly to protect the surfaces. Wear goggles and gloves during the process.
Some anecdotal sources claim that adding two aspirins to the battery’s liquid may provide a brief charge by reacting acetylsalicylic acid with sulfuric acid. This can sometimes give you enough power to reach a service station, but it should not be considered a reliable repair method.
