| 摘要 |
The present invention relates to a power supply device of a portable electronic product, especially, to a charging device having a built-in power storage unit. By means of the built-in power storage unit in the charging device, the power storage unit would enter a discharge mode to provide power to the portable electronic product or to charge its battery when the external power is not available, and this function of the present invention is not limited to time, locations or the power source and so on various external conditions.
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