How to deal with the lithium-ion battery pack if it is not charged for a long time?

1, due to the self-discharge phenomenon of lithium-ion batteries, if the battery is not used in order to obtain long-term good preservation, the battery voltage can not be lower than its cut-off voltage, preferably about 3.8-4.0V;

2, it is recommended that the lithium-ion battery be charged once a half year, so that the battery has been kept above the cut-off voltage;

3, the battery storage environment temperature and humidity should be appropriate, to operate in accordance with the specifications;

4, it is best not to put old and new batteries, different brands, capacities, and types of batteries together to charge or mix them into battery packs.

Lithium-ion battery charging is generally the use of constant current - constant voltage way, that is, the beginning is to charge the standard current for a period of time, when the battery voltage reaches the charging cut-off voltage, constant voltage charging is used. Therefore, you can use the DC power supply to charge for a period of time, until the cut-off voltage is reached and then use the original charger to charge, although this method is sometimes feasible, but it is not all possible, after all, the battery has affected the performance of the battery, but there are also placed a few years of the battery can be activated.