The shoe power generating device generates the power by the walking energy, has large power generation amount and can provide sufficient electric energy.

以走路的能量发电，发电量大，可提供充足的电能。

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An accessory device designed to be worn on a leg or arm could greatly benefit from this sort of power generation, and could lengthen the amount of time between charging.

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The former requires a greater amount of water for power generation while the latter still needs water but for washing solar panels periodically.

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The amount of storage in the current generation of iPads tops out at 64 gigabytes.

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