Generally, a lithium ion battery pulse activator (lithium ion battery charge and discharge meter) is used to charge the battery multiple times in a short time.

The 4.2V battery voltage will be fully charged and saturated due to long-term storage of electricity. There is basically no way to repair it. This kind of battery has a certain chance to recover. The normal voltage is 3.0V～4.2V (generally, the voltage of 3.0V battery will be cut off, which can be determined. This battery has reached the end of its life. Generally, a lithium-ion battery pulse activator (lithium-ion battery charge-discharge meter) is used to charge the battery multiple times in a short time. At this time, there are two situations, that is, the battery is completely depleted, not unlimited. The other is Possibly. It should be that the last time the battery was used too much power, the capacity was basically exhausted, and the battery was expired. After ten minutes, there is no way to repair this kind of thing, and there are some 4.35V), 2. The battery voltage is lower than 2.7V, 1. The battery Consumption performance: The battery voltage cannot go up and the capacity is reduced, so you can only buy a new one. If the battery voltage rises, it indicates that the battery is normal and the battery diaphragm has broken down. After all, lithium-ion batteries have a long life. If the full voltage is 4.2V, you can continue to charge until the charger prompts full. Measure directly with a voltmeter. It may be repaired. The positive and negative poles are short-circuited. If the full voltage is much lower than 4.2V, it means the battery is damaged. If you look at the full voltage, it means that the battery or battery pack is damaged. 3. If measuring 18650 lithium Ion battery pack. If the battery has been used for a long time, it is better to buy a new one. The battery has no voltage and the repair cost is generally not low. One is that the battery is good and should be replaced. If the voltage at both ends of the 18650 battery is lower than 2.7V or there is no voltage, you can Use a charger (4.2V) to charge the 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. Previous: How should I choose AGV car lithium-ion battery?