The self-discharge capacity of most lithium batteries is not large, including the 18650 lithium-ion battery, which is almost negligible;
However, if the lithium battery remains left unused for a long period of time, the capacity will undergo a chemical reaction with environmental conditions. This causes the battery to self-discharge. Generally, it needs to be charged once every 2-3 months, which is beneficial for extending the life of the lithium battery.
Rechargeable lithium batteries also suffer from self-discharge. Even if they are not used, the electricity they contain will be consumed. Since it has not been charged for a while, the lithium battery may have been over-discharged. If it is a 3.7V battery, if the voltage is lower than 2.75V, it is over discharged and the battery has been over discharged. damaged.
The normal charging and discharging time does nottherefore cannot be completed.