Crossword Genius

Units of juice! (7)

Ross

I believe the answer is:

amperes

I'm a little stuck... Click here to teach me more about this clue!

'units' is the definition.
(ampere is a kind of unit)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Another definition for amperes that I've seen is " Units of electrical current".)

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