What is the basic correct charging method for lithium batteries?

The safe working voltage range of lithium battery is 2.8~4.2V, lower or higher than this voltage range, the lithium ions in the battery become very unstable, and even cause accidents. In order to ensure that the battery is in a safe range, a special charger is required. 2. Before activating the lithium battery charger to start charging, it will supply the battery with a small current, and at the same time detect the battery voltage change, and gradually increase the current until the set value. This process can be regarded as an activation or test charge. 3. The constant current variable voltage charging charger charges the battery with a constant current. As the battery voltage increases, the charger increases the charging voltage at the same time to speed up the charging speed. 4. When the battery reaches the 4.2V cut-off voltage, the battery will only charge about 70% of the charge (not full). At this time, the charger continues to charge the battery with a constant voltage and a gradually decreasing current, until the value is less than 0.1A and the battery voltage continues to rise when the battery voltage continues to rise before stopping charging. 5. Prevent charging at too low temperature. If the lithium battery is used in a low temperature environment, that is, below 4C, the battery life will also be reduced. The original lithium battery of some mobile phones cannot even be charged in a low temperature environment. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.