The principle of lithium battery repair method one: the metal surface of the lithium battery used for a long time will have a certain degree of oxidation, resulting in mobile phone battery and mobile phone contact is not good, the use of lithium battery time is shorter, and the use of eraser or other cleaning tools can erase the surface of the rust material, so that the battery and mobile phone contact is better.

The principle of lithium battery repair method two: low temperature can make the electrolyte inside the lithium battery change, promote the chemical reaction of the battery just after freezing. The use of lithium battery is actually a process of charge and discharge. During this time, the battery's negative and positive charges collide. Batteries become less and less useful because, at normal room temperature, there is more kinetic energy inside the electrons, so the battery is active and leakage is relatively frequent. And put the lithium battery in a low temperature environment, lithium battery surface lithium film and electrolyte microstructure, as well as their interface will change significantly, resulting in the battery internal temporarily inactive, leakage current reduction. So after recharging, the phone will wait longer.

Lithium-ion batteries have a cycle life of about 600 times. If the number of charging times is too much, the thermal movement of the molecule will gradually destroy the internal molecular arrangement microstructure, and the storage efficiency will gradually decrease. "The freezing process tends to destroy the original internal structure of the battery, which may increase the ability to charge in the short term, but may not be effective in the long term." Once the microstructure of a lithium battery is damaged, it is impossible to completely restore it. Long-term use of this method will accelerate the loss of mobile phone batteries.