How to bring a dead lithium-ion battery back to life?

Lithium-ion battery suspended animation is generally divided into three situations. First, the battery cannot be charged at all, the charger and electrical appliances cannot be identified, and the electrode has no voltage. second. It can be charged, and the charger and electrical appliances can also be identified, but it can only last a few minutes, and the power is quickly exhausted. Third, it can be charged, and the capacity is still relatively sufficient, but the high current discharge voltage drops significantly (specific performance such as: the shooting mode of the camera can only last for a few minutes, and the review mode can last for a long time) Tools/material steps/ The way the battery looks dead, but there is a high probability that it can be rescued. The method I summarized is: charge the battery with a direct current equal to the design voltage of the battery. This kind of dead battery cannot be charged with the original charger (no current flows at all), but when the battery is charged with a direct current equal to the design voltage of the battery, a relatively large current will be found, and the charging current will slowly Decrease, close to 0 after a few minutes, this is good news: the battery voltage is returning to the design level. Stop charging at this time, and then use a multimeter to measure the two poles of the battery to see if there is a normal voltage. Then, you can use the original charger to charge it. In this way, I have repaired a lot of batteries, and many of them can be restored to about half of the design capacity. 5 In order to fully activate the battery, it must be fully charged and discharged several times. The discharge circuit is composed of resistors and light-emitting diodes, and the state of discharge can be estimated through the light-emitting diodes. 6 As far as my relevant experience is concerned, this method is very effective for the first battery. The batteries in the latter two cases are difficult to repair, and the information found on the Internet rarely has obvious effects. Especially the third type can be charged, and the capacity is relatively sufficient, but the high current discharge voltage drops significantly (specific performance such as: the shooting mode of the camera can only last for a few minutes, and the review mode can last for a long time). , It would be a pity to discard it. 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: Is the blade battery using lithium iron phosphate technology safer than lithium ion batteries?