Unfortunately, it is impossible to reverse hard sulfation, but it does one good to note, regarding products and services claiming to reverse sulfation, there is no real proof to back up their claims. Still, if you have a dead car battery, there are several things that you can try to get yourself back on the road, even if it’s straight to a repair shop or auto parts store for a new battery. Vehicles started using these methods should not be shut off until a new car battery can be obtained, and a couple of these methods will finish off the battery, anyway.
• Jumpstart: Jumper cables and a second battery, battery booster, or second vehicle might be enough to jumpstart the vehicle. The dead battery won’t accept a charge, though, so don’t shut the engine off! Note: Do not attempt to jumpstart a frozen battery, as it could explode. Thaw it out and attempt to charge it, first.
• Distilled Water: If electrolyte level is low, adding distilled water might be enough to fully-submerge the plates and enable a bit more reaction area. This might be enough to give the engine a few more turns.
• Epsom Salt: Epsom salt (magnesium sulfate or MgSO4) can readily be found in grocery stores, home gardening centers, and drug stores. Adding a stronger acid to the electrolyte mix, such as Epsom salt, might be enough to tip the chemical balance, delivering enough charge to start the engine. Dissolve 1 part MgSO4with 3 parts warm water, then add to each cell until the plates are covered by ¼” to ½” electrolyte.
• Aspirin: Imagine a vehicle out in the middle of nowhere, a remote camping trip, and all that’s available are a couple bottles of water and aspirin. Believe it, or not, Aspirin (acetylsalicylic acid or C9H8O4) can be used to chemically alter the electrolyte mix. Crush and dissolve 12 Aspirin tablets, 325-mg or 500-mg, in about 6 oz of warm water, and add equal amounts to each cell. Add additional water to make sure the plates are covered.
Prevention is the Best Medicine .
It’s always better to prevent damage than repair it, and in the case of the car battery, “replace it.” The only way to deal with car battery hard sulfation is to prevent it in the first place. To prevent sulfation and failure, always recharge the battery immediately after use, make sure the vehicle charging system is functioning properly, and put an unused car battery on a float charger to maintain full charge.
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