18650 lithium battery is a model of lithium-ion battery, is the originator of lithium-ion battery. There are many cases in which the battery is not charged, and different problems need to be repaired accordingly in order to solve the problem of 18650 battery is not charged. So what are the reasons and treatment methods for the battery not being charged?

There are several possible reasons why the 18650 lithium battery cannot be charged:

Poor battery connection: If the contact between the battery and the charger is poor, the battery cannot be charged. At this time, you need to check whether the contact between the battery and the charger plug is good, or replace the charger and the battery.

Incorrect battery polarity: If the battery is reversely installed into the charger, it will also cause the battery to be unable to charge. The correct operation is to connect the positive terminal of the battery to the positive terminal of the charger, and the negative terminal of the battery to the negative terminal of the charger.

Charger failure: If the charger itself fails, it will also cause the battery to be unable to charge. The charger needs to be replaced to solve the problem.

Battery aging: If the battery has been used for a long time, the battery capacity may have been reduced, and the battery internal resistance may be increased, which will cause the battery to be unable to be fully charged. In this case, you need to replace the battery.

Insufficient charging voltage: If the charger output voltage is insufficient, it will also cause the battery to not be fully charged. In this case, check whether the output voltage of the charger meets the requirements of the battery.

In short, if the 18650 lithium battery is not charged, it is necessary to check the battery connection, polarity, charger, battery aging and other factors to find the problem and repair or replace the device.