Why Do Car Batteries Leak?

2 Answers
PeterAnn
07/24/25 1:57am
Car battery leakage occurs due to chemical reactions of internal materials. Below are scenarios requiring battery replacement and handling methods for battery leakage: Scenarios requiring battery replacement: If the electrolyte has leaked severely (emptied within a short time), promptly replace with a new battery. Handling methods for battery leakage: First conduct visual inspection to locate acid leakage points. Remove the cover plate to check for acid leakage traces around the safety valve, then open the safety valve to examine if there's flowing electrolyte inside the battery. If no abnormality is found, perform an airtightness test. Finally during charging, observe whether flowing electrolyte appears. If present, drain it completely.
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ArianaLynn
08/10/25 9:36pm
Hey, as a car enthusiast, I have to say battery leakage is quite common, mainly due to several reasons: Overcharging increases internal pressure and ruptures the casing, causing electrolyte leakage; aging and deformation of the battery lead to seal failure; and external damage like impacts or bumps can compromise the battery structure. My buddy's car had a bloated and leaking battery because of frequent long-distance driving that caused the alternator to overcharge, resulting in a large area of corrosion in the engine bay—costing him over a thousand bucks to fix. So, regularly checking the voltage to ensure it doesn’t exceed 14.8 volts is key, and avoid prolonged idling for charging. Using a smart charger for maintenance is recommended. Battery lifespan is typically 3-5 years—if you notice wet spots or odd smells, replace it immediately before bigger issues arise. For routine maintenance, applying anti-corrosion spray can help prevent leaks. Safety comes first with this stuff to avoid smoke or even fires.
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