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Information × Registration Number 2117U005617, Article popup.category Thesis Title popup.author popup.publication 01-01-2017 popup.source_user Сумський державний університет popup.source http://essuir.sumdu.edu.ua/handle/123456789/62487 popup.publisher Sumy State University Description Nowadays our life continuously connects various kinds of gadgets. Most of these devices work using an accumulator. But the reserve of energy in batteries is emptying very fast. We need to charge the battery over and over again for using gadgets to continue our work. popup.nrat_date 2025-05-13 Close