FAQ
Supercapacitor FAQs
What is the difference between a supercapacitor and a battery?
A supercapacitor stores energy electrostatically and can deliver high power with very high cycle life, but stores much less energy than a battery of the same size. Batteries store energy chemically and suit longer runtimes.
Can supercapacitors be connected in series?
Yes, to reach higher voltages. Because cells differ in capacitance and leakage, series strings need voltage balancing so no cell exceeds its rated voltage.
Are supercapacitors polarised?
Most EDLC supercapacitors are polarised and marked. Reverse voltage should be avoided per the manufacturer’s datasheet.
How long does a supercapacitor last?
Lifetime depends mainly on voltage and temperature. Datasheets specify a load-life test (hours at rated voltage and maximum temperature) and end-of-life criteria such as capacitance loss or ESR increase.
Can I discharge a supercapacitor to 0 V?
EDLC supercapacitors can typically be discharged to 0 V. Lithium-ion capacitors cannot and must stay above their minimum rated voltage.
Do supercapacitors need a special charger?
They need current limiting when charging from 0 V (they look like a short circuit initially) and a voltage limit at or below the rating. Many designs use a current-limited regulator.
Can supercapacitors be reflow soldered?
Most cannot. Check the datasheet; through-hole parts are usually wave or hand soldered within specified limits.
How do I request a datasheet or sample?
Use the Request a Quote or Datasheet form with the model number and your application. Our team will respond with available documentation.
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