How to repair a lithium battery?

1 Use a clean eraser Use a clean eraser or other cleaning tool to gently wipe the metal contacts of the lithium battery and mobile phone, helping to improve charging conditions and power durability electric. Old cell phone lithium batteries that turn off automatically should be tightly wrapped in plastic wrap. They should be packed as close together as possible. The battery is divided into three layers inside and outside to ensure that the battery is under vacuum. Next, apply three layers of newspaper to the outside of the plastic packaging to completely seal the lithium battery. Place it in the freezer section of the refrigerator. After 48 hours, remove the battery and remove the six layers of paper film one by one. Lithium batteries do not exhibit swelling or deformationsurface caused by frost. After cooling for a while, recharge. 2 Fully discharge the lithium battery that is about to expire, then recharge it to activate the battery. The specific method is to deeply discharge the mobile phone, that is, to achieve a deeper charge by depleting the energy inside the mobile phone, which requires unconventional methods. Connect your phone to a small low-voltage bulb with a specific device, and the battery power will be transferred to the small bulb until all lights are emitted. "Mobile phones need to consume power slowly through lower voltage. Under normal circumstances, if the voltage after connection is lower than the rated voltage of 3.6 volts, the mobile phone will automatically turn off. The charged mobile phone battery takes longer to discharge."