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0:07 - introduction of usb module0:35 - 18650 battery use0:45 - sample build of power bank 1:45 - building of power bank2:45 - soldering iron to use4:25 - us

It supports the external key, which is connected to the K point and the output negative pole. Short press to turn on the power display and turn on the

12pcs Type-C USB 5V 2A Boost Converter Step-Up Power Module Lithium Battery Charging Protection Board USB for DIY (Not Welded)

❃❃USB is no welding version ❃❃It supports the external key, which is connected to the K point and the output negative pole. Short press to turn on the

DWEII 10PCS Type-C USB 5V 2A Boost Converter Step-Up Power Module Lithium Battery Charging Protection Board LED Display USB for DIY Charger (USB is

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❃❃USB is no welding version ❃❃It supports the external key, which is connected to the K point and the output negative pole. Short press to turn on the

DWEII 10PCS Type-C USB 5V 2A Boost Converter Step-Up Power Module Lithium Battery Charging Protection Board LED Display USB for DIY Charger (USB is

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❃❃USB is no welding version ❃❃It supports the external key, which is connected to the K point and the output negative pole. Short press to turn on the