 The development of a rechargeable magnesium battery has been a long-standing goal since the early 21st century. Several research groups have attempted to make progress towards this goal, but there remain significant challenges. The main obstacles include the lack of practical cathodes, suitable electrolyte, and slow reaction kinetics. Recent advances have focused on developing new materials and methods to address these issues. However, more work needs to be done before a commercially viable rechargeable magnesium battery can be realized. This article was authored by Rana Motadi and Fumonori Mizuno.