What are the methods to repair lithium batteries?

A few days ago, I could not use a lithium battery. My symptoms were that it could not be charged, and the camera could not be turned on (the camera showed no power). I tried it several times. There is no other way but to abandon one side, just throw it into the trash can. Later, I didn’t know what the idea was. I sealed the battery with multiple layers of absorbent paper and multiple layers of plastic film in the freezer compartment of the refrigerator (minus 18 degrees) and frozen it for two days and nights. Not willing to put it in the camera again, hey, it's completely back to normal! Let me tell you all, if you have the same situation, you might as well give it a try! There are also the following two methods: Lithium battery repair method two: Discharging can be used to start the discharge or connect the resistor. The power-on discharge should be placed to the extent that the mobile phone is turned off immediately; the resistance discharge can be used to connect the small bulb of the corresponding voltage to discharge for a long time, until the small bulb is connected to the extent that it will go off instantly. The discharge current is preferably a large current. Lithium battery repair method three: activate the 12V alternating current in series, and connect a small electric bead or resistor in series between the batteries for current limiting. First, use a small current to activate, make the control loop alternating current to tens of milliamperes, maintain it for 30 to 60 minutes, and then increase the current to 1 to 2 times the nominal value of the battery. For example, the battery of 1000 mAh is added to 1000~2000 mAh, and it is activated for 30~60 minutes. During the above process, pay attention to observe the temperature and appearance of the battery: there should be no abnormal phenomena such as hot, smoke, bulging, etc. If the temperature is too high (above 40°C), the current should be appropriately reduced. Lithium batteries that have undergone the above activation treatment can generally be used normally, but they cannot be compared with new batteries! Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to recycle different types of batteries?