What are the reasons why a car battery cannot store electricity?

2 Answers
Doris
07/29/25 5:22am
The reasons why a car battery cannot store electricity are severe sulfation of the plates, severe water loss, and single-cell short circuit. Severe sulfation of the plates: Use a positive and negative pulse method to depolarize and charge the battery, then fully discharge it. Repeat this cycle three times. If there are signs of capacity recovery, you can perform more cycles to achieve better repair results. Severe water loss: Add water for repair. You must add deionized water or purified water, and never add tap water, as it can cause significant self-discharge issues in the battery. Single-cell short circuit: Repairing a battery is a very professional task, requiring knowledge of the battery's internal structure and principles. However, not all batteries are worth refurbishing. Generally, if the battery's lifespan can be extended by replenishing electrolyte or performing charge cycles, it is worth repairing. Others, like those with no voltage or current, are not worth the effort.
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AthenaMarie
08/12/25 8:57am
A few years ago, my car's battery couldn't hold a charge well, making it difficult to start—it was really stressful at the time. I found that battery aging is the most common cause, just like how older people's legs become less agile. Corrosion of the internal lead plates or degradation of the sulfuric acid electrolyte reduces its charge-storing capacity. Another time, I accidentally left the headlights on overnight, completely draining the battery from over-discharge. If the charging system malfunctions, like a faulty alternator or charging cable, it’s as troublesome as a phone that won’t charge. Cold winter temperatures also have a big impact, slowing down electrochemical reactions and reducing stored power. I learned my lesson—now I check the battery terminals monthly for oxidation or corrosion, cleaning them and applying petroleum jelly for protection. I recommend regular battery maintenance, like getting it tested at a professional shop. Before starting the car, turn off high-power accessories like the stereo or AC to extend its lifespan and avoid unnecessary expenses. If your battery struggles to hold a charge, don’t delay—fixing it early is safer.
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