What causes a battery to overheat and fail to charge fully?

[AliviaFitz]

If a battery consistently fails to charge fully and becomes hot, it may be due to battery aging or reaching the end of its service life. Batteries have a limited lifespan, typically ranging from 2 to 3 years. If charging becomes impossible, the battery's lifespan should be considered. Solutions for a battery that won't charge fully: If the battery has reached the end of its life, it needs to be replaced; if a fuse is blown, visit a 4S shop or repair shop to have a professional replace the fuse; poor contact between the fuse holder and fuse socket requires professional attention. If there's poor contact with the power source, unplug the charger and reconnect it to ensure proper contact. Battery usage precautions: Avoid using vehicle electrical devices, such as listening to the radio or watching videos, when the engine is off; if the vehicle is parked for an extended period, disconnect the battery, as even when the vehicle is locked remotely, the electrical system enters a dormant state but still consumes a small amount of current; frequent short-distance driving can prevent the battery from charging fully, significantly shortening its lifespan. Regularly drive the vehicle on highways or use an external charging device to maintain the battery.