What Causes a Battery to Not Charge?
2 Answers
Battery not charging is caused by plate sulfation or charger damage. Below are the specific reasons and solutions: Plate Sulfation: For batteries used for a short time, mild sulfation caused by short-term over-discharge can be repaired using a desulfation charging method. However, the battery capacity can only be restored to about 80% of its rated capacity. Charger Damage: If the charger's converter is damaged and cannot convert or charge, replace the charger resistor. If the charger fuse is blown, replace the charger. If the power cord is detached or has poor contact at the battery socket, inspect and replace it.
I've been driving for over twenty years and have encountered several instances where the battery wouldn't charge. The most common issue is battery aging – when it's been used for too long, the internal plates become sulfated, rendering charging ineffective. Problems with the charger are also frequent, such as poor plug contact or insufficient output power, especially in areas with unstable voltage where charging becomes even more difficult. Cold weather has a significant impact; in northern winters, battery activity is low, and preheating might be necessary before charging. Corrosion at the connections is another hassle – rusted battery terminals or loose wires require regular cleaning with sandpaper to maintain good contact. After deep discharge, batteries become very fragile, and ordinary chargers won't work; a smart slow charger is needed for recovery. For safety, always wear rubber gloves and goggles when handling, as battery acid can spray out, and there's a risk of sparks from short circuits. I recommend checking the battery's condition and voltage monthly – timely replacement can save a lot of trouble.
