Lemon battery question

This is a simple ‘Lemon Battery’ experiment showing this classic homemade battery powering one of my low amp draw motors. The fruit came from my own lemon tree. I have been wondering if I could make a battery while the fruit is still growing on the tree. It might work just fine but I don’t want to chance harming the tree. For now this question shall remain unanswered.
Here us one of Grandad’s homemade battery videos. In this one he is using the top of a pineapple to power one of his motors. https://www.youtube.com/watch?v=D_8Yxu_YIIA

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