Batteries are a source of energy.
chemical
potential
mechanical

Yes, it is a chemical source, because it uses chemicals like alkaline to generate power.

Yes ... and no. It's a chemical device for producing electrical energy. It all depends on how you wish to use the words.

Explanation:

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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