https://www.kamcappower.com/how-supercapacitor-ultra-capacitor-compensates-for-leakage-current-changes.html Any Super capacitor/ultra capacitor will discharge through an internal shunt resistance in the case of electrification. This supercapacitor discharge current is called leakage current, which affects the self-discharge of the low leakage supercapacitor/ultra capacitor unit.All Rights Reserved