How to make a 20000mah power bank at home.

Hii friends I have made this amazing handy power bank for mobile uses.
This is very easy to make.

We need:-
1. An Electronic switch board
2. A 2amp Power bank circuit( can buy it from online)
3. 18650 li ion batteries(3000 mah 12 piece)
4. Some glue
5. Some wire
Etc....
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Thanks for watching...

Видео How to make a 20000mah power bank at home. канала Make Easy