According to still another embodiment, a method includes piezoelectrically converting mechanical strain energy from an induced mechanical stress on an array of {TAIL ~ piezoelectric electrode posts} into electrical energy; and using a geometrical arrangement of an array of capacitor electrode posts and the array of {HEAD ~ piezoelectric electrode posts} to capacitively store the electrical energy in the array of capacitor electrode posts 
According to still another embodiment , a method includes piezoelectrically converting mechanical strain energy from an induced mechanical stress on an array of { TAIL ~ piezoelectric electrode posts } into electrical energy ; and using a geometrical arrangement of an array of capacitor electrode posts and the array of { HEAD ~ piezoelectric electrode posts } to capacitively store the electrical energy in the array of capacitor electrode posts
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