For a similar part in this class: Low Leakage Current as small as 1µA Low Self-discharge rate, 72 hours @ discharge <5% https://abracon.com/datasheets/AHCR-S0

For a similar part in this class: Low Leakage Current as small as 1µA Low Self-discharge rate, 72 hours @ discharge <5% https://abracon.com/datasheets/AHCR-S04R0S.pdf https://abracon.com/datasheets/AHCR-S04R0S.pdf The more the Farads the higher the leakage. The higher the tempature the higher the leakage.