This paper presents an impact-induced frequency up-conversion piezoelectric energy harvester (FUC-PEH) to improve low-frequency output performance. The FUC-PEH includes a high-frequency piezoelectric ...

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The Seamless Stainless Steel Mug comes out on top because it pairs high performance with portability. For example, the newer 27-Ounce Stainless Mug also keeps drinks piping hot, but it can’t fit ...