Comment by ben_w

The ATP in your cells will last about 2 seconds without replacement.

Electricity is also much cheaper than food, even bulk calories like vegetable oil.[0]

And if the android is controlled by a human-level intelligence, one thing it can very obviously do is all the stuff the humans did to make the android in the first place.

[0] £8.25 for 333 servings of 518 kJ - https://www.tesco.com/groceries/en-GB/products/272515844

Equivalent to £0.17/kWh - https://www.wolframalpha.com/input?i=£8.25+%2F+%28333+*+518k...

UK average consumer price for electricity, £0.27/kWh - https://www.greenmatch.co.uk/average-electricity-cost-uk