What are the reasons for the battery not charging?
2 Answers
Battery not charging reasons are: 1. The battery is fully charged; 2. Sulfation of the negative plate of the battery, which may be caused by the design settings of ordinary constant voltage chargers that can lead to incomplete charging. Even if it can charge or discharge during use, insufficient charging will gradually reduce capacity and shorten lifespan; 3. Lack of electrolyte. If the electrolyte is dry, add distilled water first, and do not cover the battery's filling cap after adding enough. Car batteries are a type of battery, and their working principle is to convert chemical energy into electrical energy. The commonly referred to battery is a lead-acid battery, which is mainly made of lead and its oxides, with a sulfuric acid solution as the electrolyte.
I've encountered the issue of a battery not charging several times, and there are usually a few common reasons. First and foremost, the most likely cause is that the battery itself has aged. Over time, the internal chemicals degrade, reducing charge-discharge efficiency or even making it impossible to recharge, especially if my old car has been sitting unused for too long. Secondly, there could be wiring issues—poor contact at the terminals or corrosion buildup obstructing current flow. From my experience, regularly cleaning the battery terminals is crucial. Another possibility is a faulty charger or car alternator. I once tested a charger with unstable output voltage, and it was useless. Additionally, extreme environmental temperatures, either too high or too low, can affect charging efficiency, particularly noticeable in scorching summers or freezing winters. Lastly, if there's an internal short or open circuit in the battery, it's pretty much done for. I believe routine voltage checks and maintenance can prevent most of these issues, and investing in a good multimeter for self-testing is highly recommended.
