There are many kinds of lithium batteries. There are batteries composed of circular cells like 18650, and lithium batteries composed of polymers. If they are divided into two categories, they are lithium metal batteries and lithium ion batteries. The charging method is basically There are constant current charging, constant voltage charging, pulse charging, etc. Different charging methods are used at different stages. If the charging fails, there are several situations:

1. The lithium battery is in an over-discharge state
That is to say, the lithium battery has been discharged very low, in a state of deep discharge, and the power is basically used up, so that it is as low as the cut-off voltage of the lithium battery. At this time, activation methods can be adopted, but this is not necessarily effective;
2. There is a problem with the charger or charging line
First of all, you should check whether there is any problem with the charger. The method is very simple. You can directly measure the output voltage or observe the load connected to the corresponding voltage. directly disassembled and analyzed;
3. The lithium battery has been used for a long time, and the battery fails
The possibility of this happening is relatively small, but it cannot be ruled out. You should be familiar with your own battery, and you should change the battery after a long time;
4. There is a problem with the battery charging IC or BMS system
Due to the imbalance of the battery cells and other reasons, the battery management system has problems, which leads to the misjudgment of the management IC and the failure to detect the voltage or current.

Therefore, I recommend TEFOO ENERGY standard lithium battery, which is convenient for operators to carry out mobile indoor and outdoor operations. Providing continuous, efficient and stable mobile power supply has become the greatest guarantee for the normal operation of such equipment. The solution uses high-performance batteries, so that the entire battery has the characteristics of high energy ratio, light weight, small size, high cycle life, high safety, and high consistency. The battery is very convenient to use, and the original battery can be directly replaced on site.