The reason why the 18650 lithium-ion battery cannot be charged

1. The internal charging circuit is faulty and cannot be charged normally.

2. The 18650 lithium-ion battery has a fault inside.

The contact of the battery electrodes is dirty, and the contact resistance is too large, resulting in excessive voltage drop, and the host is considered full when charging, and the charging is stopped;
18650 battery cannot be charged solution:

1. The charger interface is aging or the charger itself is damaged. Replace with a new charger for testing.

2. There is a problem with the quality of the charging line. Replace the tubing with a new one.

3. The metal in the charge hole is oxidized and leads to poor contact, which is a hardware failure, and a detailed overhaul should be carried out after sales. The battery itself has been depleted or damaged, replace the battery directly.