A magnesium battery is a type of rechargeable battery that utilizes magnesium as its primary component. However, there are several other names used to describe this type of battery. One common synonym is MgB, which uses the chemical symbol for magnesium and battery. Another term that is frequently used is magnesium-ion battery. This name highlights the fact that magnesium ions are used as the charge carrier within the battery. Other names include magnesium-sulfur battery and magnesium-air battery, which refer to the type of cathode and electrolyte materials used within the battery. Ultimately, regardless of the name, magnesium batteries offer a promising alternative to traditional lithium-ion batteries as they offer higher energy density and are more environmentally friendly.