The BestCap capacitor is available in a large variety of voltages including 3V, 3.6V, 4.5V, 5.5V, 9V, 12V, and 15V. Typical electric double-layer capacitors are available in either 2.5V, 5V, or 5.5V ratings with capacitances from 6800µF to 1F. The series comes in one package with no requirements for balancing or connecting in series/parallel combinations.