The answer often circles back to supercapacitor cost. While prices have dropped 40% since 2018, a typical 3,000F supercapacitor module still costs $150-$300 – significantly higher than traditional batteries in upfront terms. Shop now on eBay for uninterrupted performance! Mouser is an authorized distributor for many supercapacitor and ultracapacitor manufacturers including Cornell Dubilier, Eaton, Elna, KEMET, KYOCERA AVX, Maxwell, Vishay & more. Smart Filtering As you select one or more. Check each product page for other buying options. However, their cost varies significantly based on key technical specifications such as capacitance, voltage rating, energy density, and physical size. Understanding. Electric double layer capacitors and supercapacitors are a class of electrolytic (polarized) capacitors that offer exceptionally high capacitance values in relation to their physical size and low voltage ratings; individual devices have ratings of a few volts at most, though products incorporating. Ultracapacitors are the technology of choice for high energy and high power applications because of their longer operating lifetime, low maintenance requirements, and superior cold weather performance when compared to batteries.