What are the reasons for a battery not charging?

[LaCameron]

The reasons for a battery not charging include: dried-up electrolyte in the battery, broken plates, short-circuited plates, etc. The most common reason is plate sulfation, which hinders the normal flow of electrons, leading to a decrease in battery capacity, inability to function properly, and gradual aging. In this case, the battery needs to be replaced. The method for removing the battery is as follows: 1. The battery is located in the engine compartment. First, open the compartment and locate the battery. 2. Remove the battery terminal protective cover and the nuts on the fixed bracket. 3. First disconnect the negative terminal, then remove the positive terminal. The negative terminal is disconnected first to avoid short circuits, as it is connected to the vehicle body. 4. After removing all the fixing screws on the battery, the old battery can be taken out.

[LaOwen]

I have encountered this situation several times myself. Common reasons for a battery not charging include battery aging, internal short circuits, and connection issues. If the battery has been used for a long time, such as more than three to five years, severe internal polarization or sulfation occurs, damaging the electrode materials, making it impossible to charge no matter what. Internal short circuits cause current leakage, keeping the voltage low and preventing a full charge. Corroded or loose connection terminals or cables can also disrupt the current flow. There are also many issues with the charging system, such as the alternator output voltage being too low or a faulty voltage regulator, which fails to provide stable current. Extreme temperatures, like in winter when it's too cold, slow down the battery's chemical reactions, reducing efficiency. In such cases, avoid forcing a charge, as it may lead to overheating or fire, posing significant safety risks. It's best to first inspect the battery and connections, use a multimeter to measure the voltage, and if that doesn’t work, visit a professional shop to check if any parts need replacement or repair.

[BarrettAnn]

I usually enjoy doing some minor repairs myself. If the battery won’t charge, start by checking the simple things. It’s common for a battery to stop charging when it reaches the end of its lifespan—internal material wear increases resistance. Check for corrosion at the connections. Loose or oxidized cable terminals can also hinder charging. A faulty or incompatible charger can cause issues too. If the alternator output is insufficient, the battery might not respond during charging. I recommend doing some DIY checks, like cleaning the terminals and using a brush to remove rust for tight contact. Try switching to a different charger to see if that works. Frequent deep discharges can cause internal damage over time, making the battery unable to charge. Safety first—avoid prolonged high-power attempts to prevent accidents. For prevention, regular cleaning and maintenance can extend battery life.

[OEliza]

My old car had the same issue last time, the battery stayed empty even after a full day of charging. The main reason is battery aging – after prolonged use, it just can't hold a charge due to damaged internal structure. Another major problem is corrosion or loose connections at the terminals; accumulated rust from lack of cleaning blocks the current flow. If the charging system fails, like the alternator not spinning fast enough to generate power, it gets worse. Cold weather exacerbates it – battery reactions slow down and efficiency drops. I've noticed short idle periods are fine, but prolonged deep discharge causes permanent damage making it unable to recharge. Avoid impatient high-load charging as it risks further damage. A simple check and cleaning of the terminals might help.

[Pluto]

I frequently drive to and from work, and my car battery often has issues with not charging properly. The reasons are mostly related to usage habits, such as frequent short trips leading to insufficient charging and accelerated sulfation inside the battery. Or failing to charge promptly after deep discharge. Oxidized or loose terminal connections can block the current. Low or faulty alternator output voltage may fail to provide adequate power. Extreme temperatures, like summer heat, can accelerate the aging of internal materials. In daily use, avoid letting the battery drain completely and prevent prolonged inactivity. Perform simple maintenance regularly, such as cleaning connection points. If it really won't charge, don't force it—seek professional repair for a reliable solution.