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Ⅱ. Technical parameters
Single-crystalline solar cell board
Working voltage：5.5V
Charging current：200mA
Host：
Accumulator capacity：4200mAh
USB output voltage：5.0V(Max.)
Output current：1000mA(Max.)
DC output：8.4V
External size：130x80x25(mm)
Ⅲ. Working principle
Storing the electrical energy produced by the photocell
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