How to Fix a Car Battery That Won't Charge?

1 Answers
LaAdaline
07/30/25 8:24am
If the battery has been used for a short period and has mild sulfation on the plates due to short-term over-discharge, it can be repaired using a desulfation charging method. However, the battery's capacity can only be restored to about 80% of its rated capacity. For batteries that have been used for a long time (over three years), there is generally no repair value, and it's better to replace them directly with new ones. Types of car batteries: 1. Conventional Battery: The plates of conventional batteries are made of lead and lead oxide, with the electrolyte being an aqueous solution of sulfuric acid. Its main advantages are stable voltage and low cost. 2. Dry-Charged Battery: Its full name is dry-charged lead-acid battery, and its main feature is that the negative plate has a high capacity for storing electricity. In a completely dry state, it can preserve the obtained charge for up to two years. 3. Maintenance-Free Battery: Due to its structural advantages, maintenance-free batteries consume very little electrolyte and basically do not require the addition of distilled water during their service life. They also feature resistance to vibration, high temperature, compact size, and low self-discharge. Their service life is generally twice that of conventional batteries.
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