Traditional　lithium-ion　batteries　cannot　meet　high　energy　density　demands　with　the　popularization　of　electric　vehicles,　hybrid　electric　vehicles,　and　portable　electronics.　Thus,　novel　electrode　materials　with　high　theoretical　capacity　and　solid-state　electrolytes　have　been　developed.　However,　they　suffer　from　structural　failure　and　interface　instability,　limiting　their　practical　application.　This　review　presents　the　recent　advances　in　liquid　metals　(LMs)　as　key　electrodes,　electrolyte　materials,　and　interface　stabilizers　for　lithium　batteries　and　beyond.　First,　the　typical　characteristics　of　LMs　are　introduced,　including　their　low　melting　points,　tunable　surface　properties,　high　electrical　conductivity,　self-healing　property,　and　fluidity,　showing　potential　application　in　next-generation　lithium　batteries.　Subsequently,　we　focus　on　the　applications　of　LMs　in　cathodes,　anodes,　and　electrolytes　for　lithium　batteries　and　beyond.　Finally,　the　remaining　challenges　and　future　opportunities　associated　with　using　LMs　in　high-performance　energy　storage　devices　are　illustrated.　©　2025　The　Royal　Society　of　Chemistry.