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

[LaAdaline]

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.

[StColeman]

I've experienced the issue of a car battery not charging. At that time, the car wouldn't start, which was really frustrating. First, I checked the battery terminals and found them covered with green corrosion spots. I cleaned them with baking soda solution and let them dry. Using a multimeter to measure the voltage, it should normally be 12.6 volts, but mine was only 10 volts, clearly indicating aging. After trying to charge it for several hours with no response, this suggested an internal short circuit or sulfation, so I had no choice but to replace the battery. Usually, it's important to avoid running the air conditioner at full blast for too long to prevent excessive power consumption, and to regularly clean the terminals to prevent corrosion. After replacing the battery, everything returned to normal. Battery lifespan is generally three to five years; replace them in time when they age to avoid getting stranded on the road. Checking the voltage before driving gives more peace of mind.

[DeHazel]

A battery that won't charge can be quite dangerous, so I handle it with extreme caution. First, ensure the terminal bolts are tightened securely without any looseness, and clean any corrosion with water. Then, test whether the charger's current is normal - if the battery voltage is too low, replace it to avoid power failure while driving. The alternator might be malfunctioning, so take it to a professional shop to check if the output is around 14 volts. During regular driving, turn off unnecessary electrical devices to prolong battery life. Replacing a battery isn't expensive but can prevent bigger issues - don't delay repairs. It's recommended to test the battery's condition with a multimeter every six months, prioritizing safety without negligence.

[MaryLynn]

A battery not charging is usually a minor issue. I've encountered cases where simply cleaning the terminals and applying some anti-corrosion lubricant worked. Try deep discharging then recharging to see if it reactivates, but beginners shouldn't experiment carelessly. If the charger isn't faulty, replacing the battery isn't much trouble either. Battery aging is normal - replacing every 3-5 years is better than getting stranded. Minimize electrical usage when parked, and long drives help maintain charge. Repair shops offer quick, affordable solutions. Don't let it become a bad habit.