Methods for testing the pros and cons of lithium batteries

How to distinguish lithium batteries? The fastest inspection method is to test the internal resistance and the maximum discharge current. The internal resistance of high-quality lithium batteries is very small, and the maximum discharge current is very large. There are 20 short-range multimeters directly connected to lithium batteries with two electrodes. Generally, it should be about 10 current, even higher, and can last for a period of time, relatively stable and good battery. When the phone is turned off, please check the voltage of the battery after it is fully charged. It should be about 4.2v, but only if the charger is good. Otherwise, 4.25-3.18 can be considered good. Then turn on the power (play a song or something) and measure the voltage change of the battery. The working voltage of a fully charged battery is stable at around 3.6v for a period of time (the higher the better, the lower the better, but the worse). Once it works, the voltage drops sharply and continues without obvious voltage stabilization period, indicating that there is a problem with the battery discharge energy. In the case of purchasing a lithium battery, you can judge by the following methods: 1. Look at the fullness of the appearance. Generally, the lithium battery is about 2000mAh, which is relatively large. The workmanship is more refined and the packaging is more plump. Second, looking at the hardness, you can pinch or pinch the middle part of the lithium battery by hand. The hardness is moderate and there is no soft squeezing feeling, which proves that the lithium battery is a better quality battery. 3. Look at the weight. The weight of the battery is felt from the outer packaging, if the heavy is a high-quality battery. Fourth, the most important thing is that during the work and life of the lithium battery, the battery is discharged for about 10 minutes. If the two poles of the battery are not hot, this proves that the battery protection board system is good. Usually, the high-quality protection board lithium battery is better than the ordinary lithium battery. . Disclaimer: Some pictures and content of articles published on this site are from the Internet, if there is any infringement, please contact to delete.