Recent breakthroughs in battery science promise safer, more efficient energy storage solutions. Novel quasi-solid electrolytes for lithium-ion and magnesium batteries enhance stability and performance, addressing long-standing technical hurdles. Advances in lithium metal battery design focus on electrolyte affinity and stack pressure effects, improving energy density and safety. Additionally, developments in carbon allotropes and polymer-based supercapacitor electrodes contribute to next-generation energy materials. These innovations are pivotal for electrification and sustainable energy strategies.