Analysis of 18650 battery consumption test

Battery consumption performance: the battery voltage does not go up and the capacity decreases. 2 Measure straight with a voltmeter, if the voltage at both ends of the 18650 battery is lower than 2.7V or there is no voltage. Indicates that the battery or battery pack is damaged. The normal voltage is 3.0V～4.2V (generally 3.0V battery will cut off the voltage, 4.2V battery voltage will be fully charged, and some also have 4.35V). 3 If the battery voltage is lower than 2.7V, you can use the charger (4.2V) to charge the battery. After ten minutes, if the battery voltage rises, you can continue to charge until the charger prompts overflow, and then look at the overflow voltage. If the full battery voltage is 4.2V, the battery is declared normal, it should be because the battery was cut off because of the excessive power consumption last time. If the full battery voltage is much lower than 4.2V, it means that the battery is damaged. If it is a battery that has been used for a long time, it can be judged that the battery life is over and the capacity is basically exhausted. Should be replaced. There is basically no way to fix it. After all, lithium batteries have a life span, not infinite. 4 If the battery is measured and the battery has no voltage, there are two situations at this time. One is that the battery was originally good and it was stored for a long time. This battery has a certain chance to recover. Generally, a lithium battery pulse activation meter (lithium battery Charge and discharge meter) to charge the battery multiple times in a short time, and it may be repaired. Generally, the repair cost is not low, so you should buy a new one. Another possibility is that the battery is completely worn out, the battery diaphragm is broken down, and the positive and negative electrodes are short-circuited. There is no way to fix this kind of thing, only buy a new one. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.