How to judge the capacity of a battery

For example, it took 65 minutes for a lithium battery to discharge from a full charge (4.2V) at 600mA to 2.75V. The battery capacity is 600mA*(65/60)hu003d650mAh. When a battery is discharged, the voltage of the battery will gradually drop with the loss of battery power. In this way, a relatively simple and useful correspondence can be obtained, that is, voltage versus capacity. Obtain the discharge curve of a battery in normal operation (for example, 50mA discharge), and divide the time into 4 equal parts. Take a lithium battery with a charging constraint voltage of 4.2V as an example. You can list such a corresponding link [Vacuum Ball Sealing Machine] 4.20V ----100%3.95V----75%3.85V----50%3.73V----25%3.50V----5% (because the mobile phone cannot completely use up the battery power, generally It may automatically shut down when it is lower than 3.50V) 2.75V----0% In the hidden menu of many mobile phones, you can call up the engineering mode to check the battery voltage, such as Samsung series mobile phones, and mobile phones such as S1200 and S1000. Both can see the battery voltage. Of course, the above correspondences vary because of the types of batteries and different manufacturers, but they are similar and can be used for reference. With such a corresponding connection, the display of the battery power of the mobile phone is relatively simple. The single-chip microcomputer samples the voltage value of a battery, for example, if the voltage is 3.90V, it will display 3 grids (4 grids is full), and so on. We know that the battery is the origin of the mobile phone’s electrical energy, which is also the power of the mobile phone. Without battery power, the mobile phone is also a piece of scrap iron. A high-capacity and high-function battery can not only give the mobile phone a long-term battery life, but also Maintaining the circuit of the mobile phone allows the mobile phone to operate efficiently for a long time, and vice versa is likely to cause unexpected damage to the mobile phone. For our players, the function of the battery has been qualitative at the time of leaving the factory. The battery's power level and function are determined by the battery itself. In this respect, we cannot change it artificially. But this is not to say that after we get the battery, we can't do anything with it. Mobile phones use lithium-ion rechargeable batteries. When the stored power in the mobile phone is used up, it can be recharged to replenish the power. Don't underestimate the charging process. A good charger and correct charging method can maintain the battery's long standby time and extend the battery's service life. Furthermore, it can also be used for maintenance of mobile phones. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: How to recycle used lithium batteries