Nearly 6-Year-Old Phone Battery Catches Fire as Aging Lithium-Ion Cells Show 5 Warning Signs
Updated
Updated · How-To Geek · Jun 7
Nearly 6-Year-Old Phone Battery Catches Fire as Aging Lithium-Ion Cells Show 5 Warning Signs
2 articles · Updated · How-To Geek · Jun 7
Summary
A nearly six-year-old phone caught fire after its lithium-ion battery failed, a rare case the report says followed months of visible battery deterioration.
Five warning signs stood out: sharply shorter battery life, unusual heat during normal use, erratic charge readings, random shutdowns or reboots, and the phone body separating from battery swelling.
The report says aging cells typically lose about 10% of capacity a year, while rising internal resistance, voltage instability and lithium dendrites can trigger an internal short and thermal runaway.
Replacing a battery once it falls to roughly 75% to 80% of original capacity can cut risk and restore performance, while a phone that feels alarmingly hot should be unplugged and set aside.
Smartphone battery fires remain uncommon, but the case underscores that older devices still need battery checks or replacement rather than indefinite use.