How to Repair a Swollen Battery?

[McWalter]

It cannot be repaired. The internal changes of the battery have caused the casing to swell and deform. After repair, it cannot meet the original technical standards and poses safety hazards. If it only heats up slightly during normal charging and has minor swelling, it should be fine temporarily, but the best solution is to replace it with a new battery to ensure safety. Many electric vehicle fires are related to this issue. If the battery is swollen, it should not be used further, as charging can also be dangerous. The reasons for lead-acid battery swelling include: 1. Charger parameters: Mismatched charger parameters causing thermal runaway during charging, leading to battery swelling. 2. Quality issues: Problems with the internal electrode groups, such as micro-short circuits or lack of acid, can also cause thermal runaway and swelling of the battery.

[VonMarcus]

I've repaired many car battery issues, and the most common cause of swelling is overcharging or internal aging leading to gas buildup. Remember, safety first: never try to squeeze the bulge or vent the gas yourself, as it poses a high risk of explosion. I always disconnect the battery first to prevent sparks, then check if the alternator's output voltage is around 14V—if it's too high, I adjust the charging system. A swollen battery is basically dead; replacing it is the smartest move. I also recommend cleaning the battery terminals to prevent corrosion and regularly using a multimeter to check the voltage, ensuring no overcharging occurs to avoid similar troubles. Don't try to save money by extending its use—safety is paramount.

[DePenelope]

Years of experience in automotive repair have taught me that a swollen battery is mostly caused by overcharging or excessive heat. Customers often ask if it can be repaired, but I always tell them straight that it's dangerous due to the buildup of gases and cannot be fixed. First, stop using the vehicle and carefully remove the battery to avoid injury. Check the wiring for any short circuits, especially whether the alternator is functioning properly. Once the battery is swollen, it must be replaced immediately—don't delay. I recommend having a professional inspect the battery condition during annual maintenance—prevention is always better than cure.

[VanAmelia]

As a cautious driver, I place great importance on road safety. A swollen battery is a warning sign, and I would immediately turn off the engine and park the car, avoiding any contact to prevent explosion. This situation cannot be repaired by individuals as the internal structure is already damaged. I have consulted professional shops, and they recommended directly replacing the battery and checking the charger settings. In daily use, I regularly clean the battery surface to reduce the risk of corrosion, ensuring a worry-free driving experience.

[LilaFitz]

Want to save money on dealing with a swollen battery? I tried but found it too risky. First, safely disconnect it to check if dirty terminals are causing poor contact. Cleaning might offer temporary relief but won't fix the root cause. In most cases, you'll need to replace the battery, and buying a discounted one now is cost-effective. The last time I replaced mine, it lasted over three years without issues. To prevent recurrence, avoid leaving the car parked for long periods with insufficient charge, and keep maintenance records properly.