Is it normal for the mobile phone to display red lightning when charging? It is normal for Samsung mobile phone to display red sign when charging.

It may be that the remaining battery power is basically exhausted, and it takes a while to recover slowly. If this display is still displayed after charging for a long time, it may be that the battery is damaged and cannot be charged. ? It may also be that there is something wrong with the charging cable of the mobile phone, but try to plug the USB cable into the computer to charge. Finally, consider whether the charger is worn and unable to charge.