Common problems and precautions for mobile power lithium batteries are detailed below:

1. Overcharging problem: When the voltage of a single cell of a lithium-ion battery exceeds the specified value, it will cause the electrolyte in the battery to decompose. The decomposition of the electrolyte will cause the battery temperature to rise, reducing the service life of the battery core. When the decomposition is severe, the gas generated may also cause the battery to explode.

2. Over-discharge problem: Over-discharge problem can also shorten the life of lithium-ion batteries. It is particularly important to note that over-discharge of lithium-ion batteries causes irreversible damage to the battery. That is to say, once the battery is damaged due to over-discharge, no measures can be taken to restore the battery to a healthy state.

3. Overcurrent and short circuit problems: Overcurrent problems mean that excessive current during discharge can also cause damage to the battery, and this damage is also irreversible. Lithium-ion batteries have certain limits on discharge current. When the discharge current exceeds this critical value, the life of the battery will be affected.

4. Battery balancing problem: Power lithium-ion batteries sometimes require several, dozens or even hundreds of strings, and these batteries may be found to be unbalanced during use. This is because the production of batteries requires many processes. Although they undergo very strict testing at the end, after all, various differences will occur during the production process. After a period of use, these differences will begin to slowly appear.

5. Ambient temperature issue: For the use of lithium batteries, the impact of ambient temperature on battery life is often ignored. Generally, the battery specification sheet indicates the temperature range of the battery, but when the temperature is too high or the temperature is too high, In low environment, the self-discharge rate of the battery will be much higher, especially high temperature will greatly reduce the life of the battery.

6. Charger problem: The charger of the mobile power supply is easily damaged. One reason is that the AC voltage is unstable. In some areas, the voltage will exceed 250 volts, which can easily burn the high-voltage part of the charger. Another reason is that the power cord is short-circuited and causes the charger to burn out. Some friends do not pay attention to the use of chargers and charging cables. For example, after it rains and water enters, charging without drying it is often burned out. In addition, the poor anti-interference ability of the charger and poor product quality are also the main reasons.

7. Capacity issue: The capacity and price of mobile power supplies vary greatly. Generally speaking, you get what you pay for. The larger the capacity, the higher the price. But if some capacity is marked with a very large capacity, tens of thousands of mA but the price is very cheap, it must be a false mark.

8. Aging problem: The mobile power supply will gradually age during use, and the capacity will gradually decrease.

9. Maintenance issues: How to maintain the mobile power supply in daily life, keep away from moisture and water, keep away from high temperature and fire, avoid external impact and fall, do not charge and discharge regularly for a long time, use a better and thicker charging cable, and keep it The charging port is clean.

10. Safety issues: Pay attention to safety issues when using the mobile power supply. Avoid throwing it into fire, damage to the charging protection circuit, violent impact from external force, or forgetting to remove it after charging for a long time, which may cause the power bank to explode. Tempers explode. Especially for mobile power supplies that use 18650 battery cells. Due to the structure of this battery cell, it is easy to cause the internal electrolyte to boil. If it is too late to release the pressure through the head, it will explode.

The above is a detailed introduction to common problems and precautions for mobile power lithium batteries. I hope it will be helpful to you.