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Use "ultracapacitors" in a sentence
"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."