Case 1727 ยท Public preview
An Intact Vent Does Not Exclude Thermal Electrolyte Loss
Two supercapacitors had severely diminished capacitance and residue around their positive-terminal seals.
Bench charging testOptical microscopyComponent dissectionSEMEDSFailed-to-functional comparison
What the evidence preview establishes
Excessive operating temperature most likely evaporated the volatile electrolyte, breached the positive-terminal seals, and left the failed capacitors internally dry with little remaining capacitance.
Why this case matters
A supercapacitor can lose electrolyte through a terminal seal without opening its pressure vent. Respect the specified temperature ceiling and evaluate local hot spots, especially when nearby adhesive restricts convective cooling.
Full evidence reserved for MEMBER and STOREThe complete case includes the evidence sequence, four interpreted figures, alternative explanations, limitations, and practical application guidance.