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