1. Voltage protection: overcharging and discharging, which may vary depending on the material of the lithium battery. This may seem simple, but in terms of details, there is still experience and knowledge.

　　2. Overcharge protection: In our past, the protection voltage of a single battery was always 50-150mV higher than the full charge voltage of the battery. But power lithium batteries are different. If you want to extend the battery life, you can choose the battery's full charge voltage, even lower than this voltage.

　　3. Overdischarge protection is also related to the material of lithium batteries, such as manganese lithium batteries, which are generally selected between 2.8V and 3.0V. Try to have a slightly higher voltage than the overvoltage of its single battery. Because the discharge characteristics of batteries produced in China are completely different when the battery voltage is below 3.3V, it is necessary to protect the battery in advance, which is a good protection for its lifespan.

　　4. Lithium battery protection board, which is equivalent to the brain of a lithium battery. MOS tubes play a very important role in lithium battery protection boards, as they can detect overcharging, over discharge, over current during charging, over current during discharge, and over current during short circuits.

　　5. Lithium batteries should be charged using the original charger provided at the time of purchase as much as possible. Otherwise, it is easy to cause uneven charging of the battery due to mismatched current supply of the charger, which affects its performance.

　　6. The service life of a lithium battery depends on the number of times it is charged, so it should be recharged as much as possible when the lithium battery is basically depleted.

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