What happens if a capacitor is not used for a long time?

Long periods of disuse of capacitors may have some effect on their performance and condition, depending on the type, quality and storage conditions of the capacitor.
Here are some possible scenarios:

• Capacity Loss: Capacitors may lose some of their capacity when left unused for an extended period of time. This is because the capacitor's dielectric (usually a dielectric material) may gradually break down or degrade, causing the capacitor to be unable to store the same amount of charge. This phenomenon is more common in ceramic capacitors and electrolytic capacitors.
  
  
• Increased leakage current: Capacitors that have not been used for a long time may cause increased leakage current. This is because the insulating material in the capacitor may no longer effectively isolate the charge due to age, allowing current to escape.
  
  
• Capacitor damage: If the capacitor is stored under extreme conditions, such as high temperature or high humidity environments, or is subjected to excessive voltage, it may cause damage to the capacitor if it is not used for a long time. This may include deterioration of insulation materials or corrosion of electrodes.