What are the reasons why a car battery cannot store electricity?
3 Answers
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.
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.
As a young person who drives frequently, my experience with a car battery that couldn't hold a charge taught me a lot. The main reasons include aging due to reaching the end of its lifespan, insufficient charging, or excessive use of electrical devices. Over time, the internal components of the battery degrade, naturally reducing its ability to store power. If the charging system malfunctions, the alternator isn't working, or the wiring is damaged, electricity can't get in. Additionally, leaving the car idle for long periods or installing too many high-power lights and audio systems, repeatedly draining the battery, also causes damage. I remember once when I couldn't start my car after a week-long vacation—it was because I didn't start the car and let the battery "starve." Prevention is simple: start the engine at least once a week and let it charge for 10 minutes, and avoid leaving headlights on all night. During inspections, first check for battery leaks or terminal oxidation, clean them, and ensure good ventilation. Don't rush to replace the battery; try using a charger to slowly recharge it. For safety, consult a mechanic to diagnose the electrical system.
