Because once the power bank is turned off, its internal lithium battery will slowly increase the battery voltage due to the chemical reaction of the electrolyte. This situation is very common in rechargeable batteries, but its accumulated voltage is virtual electricity and electricity. The internal resistance is large, so the battery voltage drops quickly after charging.
From the description, it can be concluded that the internal leakage current of the battery is small and the internal chemical reaction is good. In addition, it should be emphasized that charging once the battery is low, it must be charged in time. The rechargeable battery will be low on power for a long time and will eventually be discharged to a 0V battery by leakage current. is recharged, the capacity of the lithium battery will be significantly reduced. Overdischarging and overcharging harm lithium.
What to do if the 18650 battery cannot be charged? What to do if the 18650 battery cannot be charged?
It will be effective in a short time, but long-term use will damage the battery.
1. The process of using the cell phone battery is a process of charging and discharging. During this time, the negative and positive charges of the battery collide.
2. The reason why batteries become less and less durable is that at normal room temperature, the internal kinetic energy of electrons is relatively large, so the battery is in an active state and leakage is relatively frequent. When the battery is placed in a low temperature environment, the microstructure of the lithium film and the electrolyte on the surface of the lithium battery, as well as their interface, will undergo significant changes, making the battery temporarily inactive and reducingizing leaks. current. Therefore, after recharging, the battery life of the mobile phone will increase. ?
3. The freezing process can easily destroy the original internal structure of the battery. It can increase the load capacity in a short time, but it may not be effective for long-term use. Once the microstructure of the battery is destroyed, it is impossible to completely recover it. Long-term use of this method will accelerate the loss of cell phone batteries.
1. Repair principle 1: The metal surface of lithium batteries used for a long time will be oxidized to a certain extent, resulting in poor contact between the mobile phone battery and the mobile phone, and the use time of the lithium battery will be shortened. Use a rubber scraper or other cleaning tools to wipe off the rusty materialon the surface to improve contact between the battery and the phone.
2. Repair Principle 2: Low temperature can change the electrolyte inside the lithium battery and promote chemical reactions in the newly frozen battery. The process of using a lithium battery is actually a process of charging and discharging. During this time, the negative and positive charges of the battery collide.
The reason why batteries become less and less durable is that at normal room temperature, the internal kinetic energy of electrons is relatively large, so the battery is in an active state and leakage is relatively frequent. When a lithium battery is placed in a low temperature environment, the microstructure of the lithium film and the electrolyte on the surface of the lithium battery, as well as their interface, will undergo significant changes,resulting in temporary inactivity inside the battery and reduced leakage current. Therefore, after recharging, the battery life of the mobile phone will increase.
3. Third principle of repair: Deep discharge of the mobile phone involves achieving a deeper recharge by depleting the internal power, which requires unconventional methods. Find a way to connect the cell phone to a small 1.5V light bulb. The energy in the lithium battery is transferred to the small bulb until it fully emits light. "Cell phones must slowly drain due to lower voltages. Under normal circumstances, if the cell phone is connected and is lower than the rated voltage of 3.6 volts, it will automatically turn off after discharge, the battery of the mobile phone recharged." can be used longer.
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