The first state is the normal state. The green light on this charger means the lithium battery is charging. As long as the battery is full, it will automatically change color. .
The second situation is worse. If the light never changes and you remove the lithium battery and find that the lithium battery is fully charged, then there is a problem with the charger. damaged, causing the indicator status to remain unchanged, making it difficult to determine whether the lithium battery has been charged. In this case, prompt repair or replacement of a new charger is necessary.