First, power requirements, discharge time and system voltage variations play a decisive role. The output voltage drop of the supercapacitor is composed of two parts. The other part is caused by the internal resistance of the supercapacitor. It depends on the time, in very fast pulses, the internal resistance is dominant, whereas in long bursts, the capacitance is dominant. According to the HCC capacitor standard, select the following basic parameters to determine the size of the

1) It should not be used under rated voltage. 2) Supercapacitors should not be forced to twist or invert; 3) The temperature of supercapacitor should not exceed the upper or lower limit of rated temperature. 4) Charging voltage should not exceed rated voltage;

Supercapacitors show a significant "non-conductive absorption" energy storage mode, so the traditional method will not be able to accurately measure the capacity of supercapacitors, such as LCR meter commonly used in the laboratory, the measurement of the capacity of supercapacitors will be inaccurate. Below we list a measurement method of supercapacitor capacity, which is calculated based on RC time constant.

Lifetime Supercapacitor has a longer working life than the secondary battery, but its working life is not infinite, supercapacitor in the form of basic failure was an increase in capacitance resistance (ESR) and (or) lower capacitance, the actual failure forms often associated with the application of the user, the long-term thermal (temperature) overvoltage (voltage), or frequent large current discharge will lead to increase or decrease the capacity of capacitance resistance.