What to Do When the Battery Bulges During Charging?

[VanSilas]

When using valve-regulated sealed lead-acid batteries, it is necessary to reduce the float voltage and charging current; avoid using poor-quality batteries. When the exhaust is not timely and the pressure reaches a certain level, the valve-regulated sealed lead-acid battery may bulge and deform.

[LaAlice]

Last time I was charging, I noticed the battery was swollen and got a bit nervous. I quickly unplugged the charger because overcharging can cause internal pressure to build up and deform the battery. I moved it to a ventilated area outside the garage, wearing gloves and goggles to avoid contact. A swollen battery is prone to leaking acid or even exploding, so never continue using it. I went to the auto shop and replaced it with a new battery. The owner said it might have been due to charging for too long or the battery itself aging and cracking. Afterward, I learned to use a smart charger with automatic protection when charging and to regularly clean the battery surface to prevent corrosion. I now check the battery once a month to ensure the connections aren’t loose. When replacing the battery, I choose original equipment parts to avoid a repeat. If you encounter this issue while out, it’s safer to call a tow truck for repairs.