Lithium battery charger is a charger used to charge lithium-ion batteries. It has high control precision and can charge lithium-ion batteries with constant current and voltage. But the battery cannot be stably fixed, which can easily cause the problem of battery ejecting.

　　The charging compartment of lithium battery chargers is generally open. When charging the battery, lithium ions are generated on the cathode of the battery, and the generated lithium ions move through the electrolyte to the anode. The more lithium ions embedded, the higher the charging capacity.

　　Lithium batteries are essentially batteries with concentration differences. The positive and negative electrode materials have different electrochemical potentials, separated by a separator. Only lithium ions can move through the separator in the electrolyte, while charge compensating electrons can only move through the external circuit to form a current for output use.

　　1. The working selection of the charger should be consistent with the charging pool. If the charger works in the state of lithium battery and recharges the NiMH or Nickel–cadmium battery, the battery will not be fully charged, which will greatly reduce the working time. If the charger operates in a nickel battery state and recharges a lithium-ion battery, the lithium-ion battery will be overcharged, which will seriously affect the battery's lifespan.

　　2. To understand whether the battery is truly fully charged when the charger used is fully charged and turned on. Some chargers can remove the lithium battery when the full indicator light is on, while others can only remove the battery when the indicator light is fully on.

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