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DIY Powerbank, I need to know something first :) Answered

Hi guys! We have this project on making a powerbank of our own. But I don't know how to start, what to use. Here are my questions.
Is it possible to make a powerbank without using the 5v usb stepup board? 
If that is possible, how? 
How will it discharge and charge without that board? 
Help please!!! 
Thanks in advance.

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Downunder35m
Downunder35m

5 years ago

It is not.
Ask Google why and if you still can find the answer come back and provide the details we need.
Last time I checked noone here was clairvoyant, so ...