The charger heats up simply because a lot of electricity is lost inside the battery, resulting in improper heating caused by excessive current when charging.
The second is that the charger may not match the battery, or the current output caused by the aging of the charger is too large and too low will cause the charger to be hot.
Third, there may be an internal short circuit of the charger, that is, there is a problem with the parts inside the charger, causing the overheating of the charger.
To solve these problems is very simple, you can replace a new charger or cool the charger by physical cooling, such as installing a fan inside the charger or placing the charger in a cool and ventilated place. Because if the charger is not dissipated in time, the damage to the charger is very great.
1, try to charge in a place with good ventilation effect, avoid direct sunlight, avoid material covering the charger for charging, if the ventilation effect is not good. The damage to the charger is great if the heat dissipation is not normal;
2, the use of a long time charger should check whether the power line connected to the battery is exposed, to prevent the two lines connected, resulting in large load after plugging in the power and damage to the charger;
3, usually try not to directly put the charger in the spare box on the car, to prevent subversion and damage to the charger electronic components when riding, or in the summer for a long time to stop the car in direct sunlight to expose the battery and charger, which will have an impact on the battery and charger