Definition of "ultracapacitors" []

• Plural form of ultracapacitor. (noun)

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• "Energy storage devices called ultracapacitors can be recharged many more times than batteries, but the total amount of energy they can store is limited."
• "Devices called ultracapacitors act in the opposite manner, storing less energy but releasing it in a hurry."
• "According to AFS Trinity, the dual energy storage system at the heart of the XH-150S uses off-the-shelf lithium-ion batteries, buffered by fast, electronic energy storage devices called ultracapacitors that handle high currents during acceleration that would otherwise heavily stress and reduce the useful life of the batteries."