What does the battery charging indication mean on a BMW?

[JanelleAnn]

This situation generally indicates insufficient battery charge. It is recommended to promptly use a portable charger to replenish the battery power to prevent complete discharge. Introduction to Automotive Batteries: A device that converts chemical energy into electrical energy is called a chemical cell, commonly referred to as a battery. After discharging, it can be recharged to regenerate the internal active materials—storing electrical energy as chemical energy; when discharge is needed, the chemical energy is converted back to electrical energy. Such batteries are called storage batteries (Storage Battery), also known as secondary cells. A storage battery is essentially an electrochemical device that stores chemical energy and releases electrical energy when necessary. Classification of Automotive Batteries: Commonly used automotive batteries are mainly divided into three categories: conventional batteries, dry-charged batteries, and maintenance-free batteries.