This　paper　provides　insights　into　the　four　key　behaviors　and　mechanisms　of　the　aging　to　failure　of　batteries　in　micro-overcharge　cycles　at　different　temperatures,　as　well　as　the　changes　in　thermal　stability.　The　test　results　from　a　scanning　electron　microscope　(SEM)　and　an　energy-dispersive　spectrometer　(EDS)　indicate　that　battery　failure　is　primarily　associated　with　the　rupture　of　cathode　materials,　the　fracturing　and　pulverization　of　electrode　materials　on　the　anode　current　collector,　and　the　formation　of　lithium　dendrites.　Additionally,　battery　safety　is　influenced　by　environmental　temperatures　and　the　battery’s　state　of　health　(SOH),　with　failed　batteries　exhibiting　the　poorest　stability　and　the　highest　mass　loss　rates.　Under　isothermal　conditions,　micro-overcharge　leads　to　battery　failure　without　thermal　runaway.　Thus,　temperature　stands　out　as　the　most　influential　factor　in　battery　safety.　These　insights　hold　significant　theoretical　and　practical　value　for　the　development　of　more　precise　and　secure　battery　management　systems.　©　2024　by　the　authors.