Wet type electric double layer capacitors (Gold capacitor) (activated charcoal electrodes with organic electrolyte) Ideal for IC memory back up (μA range load) No charge/discharge circuitry required unlike batteries and cannot be over or under charged Charge/discharge cycles greater than 100000 times Volumetric efficiency (SD is 30% smaller than SG series, SG is 50% smaller then NF series) Longer life than a secondary battery Recommended applications include memory back-up for video and audio equipment, printers, cameras, data terminals, telephones, intelligent remote controls and rice cookers