Can a Car Battery Really Be Repaired?

[TravisFitz]

A car battery can be repaired, but only if its voltage is above 9V, the casing is intact, and its shape has not changed. Methods for maintaining a car battery include: 1. Avoid storing it in a discharged state: A discharged state refers to when the battery is not recharged promptly after use, which can easily lead to sulfation. Lead sulfate crystals form on the plates, blocking ion channels and resulting in insufficient charging and reduced battery capacity. The longer the battery remains idle in a discharged state, the more severe the damage. When the battery is not in use, it should be charged once a month to extend its lifespan. 2. Prevent exposure to high temperatures: An excessively hot environment increases internal pressure in the battery, forcing the pressure relief valve to open automatically. The direct consequence is an increased loss of water from the battery, which inevitably leads to reduced battery activity, accelerated plate softening, and fatal damage such as heat generation during charging, bulging, or deformation of the casing.