“If you filled a new lead battery with a magnesium sulfate solution instead of sulfuric acid electrolyte, it would have no capacity at all.” Simply put, adding Epsom salt will not recover the battery capacity but does “artificially” increase the SG.Īccording to Wehmeyer, the result would be similar if you remove the dilute electrolyte from a discharged and/or sulfated battery and refill it with the electrolyte for a fully charged battery (usually 1.270). “This is because the sulfates in the Epsom salt are tied up as magnesium sulfate and are not available for discharge to lead sulfate as the sulfates in sulfuric acid are,” said Wehmeyer. According to Wehmeyer, adding Epsom salt (magnesium sulfate) to a lead-acid battery will ‘artificially’ increase the specific gravity reading (SG), but because it does not increase the sulfuric acid concentration, it does nothing to improve battery performance. One of the more common ones is adding Epsom salt to the battery cells. He says that many of these hacks claim to show some type of improvement, but the gains shown may simply be artificial. Battery, has more than 50 years of experience in rechargeable battery design and development. It is also important to understand that many of the supposed “cures” can damage the battery, while others can be dangerous and do nothing to improve battery performance.įred Wehmeyer, Senior VP of Engineering at U.S. The truth is, there are many factors that contribute to poor battery performance and failure, and it is important to diagnose the symptoms of poor battery performance before determining a cure. Numerous online videos show a variety of ways to revive a dead or dying battery using various substances and hacks. When your deep-cycle battery nears end-of-life, it’s normal to want to squeeze as much out of it as possible before spending money on a new one.
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