Generally, it can be activated by directly charging the positive and negative terminals of the battery. If the lithium battery is discharged for a long time, it will sometimes automatically discharge to a lower voltage than normal, so the protection board will be turned off. It depends on the design of the protection board and the low voltage.
If the cell voltage is lower, the external protection board cannot be activated. At this time, you should ignore the protection panel and directly charge and activate the battery cell. Generally, a special multi-functional power supply is required, adjust the no-load voltage to 4.2V, short circuit the positive and negative poles of the power supply, turn on the current limiting function, and adjust the current to less than half. of the nominal capacity of the battery. Of course, the smaller the better. Then turn it on andactivate it. Depending on the battery capacity, if the voltage drops below 3V, it can usually be recognized by the universal charger.
How to restore the capacity of an 18650 lithium battery
18650 is the first model of lithium-ion battery and one of the most technologically advanced lithium-ion batteries mature
< p>Now it's high. High quality 18650 batteries used in laptops or power tools have very good performance in terms of service life and discharge rate. Of course, there are also many low-end 18650 batteries in China, and the price is high. relatively cheapI think the batteries you mentioned that are easy to break are probably low end bargains. The price war in this market is serious and the quality is obviously underground.
As for. repair, although this type of battery is a batsecondary battery and can be recharged repeatedly, if it breaks down once. The problem is that there is no way to repair it, because serious changes in the voltage or power of this battery indicate that there is a problem with the internal system of the battery
In addition, although the price of good 18650 batteries is relatively expensive, the performance is absolutely guaranteed here, we call on everyone to boycott counterfeit products
Failed. Lithium batteries are difficult to restore. This is a method I have seen online and has also been shown on the CCTV news channel. You might as well try it: wrap the lithium battery in several layers of newspaper (to avoid humidity) and put it in the freezer of the refrigerator for two or three. three days. After removing it, leave it at room temperature for another two days. Then charge and discharge for three cycles. Wesays that some capacity can be restored.