ساخت پاور بانک 20هزار و 40هزار میلی آمپر

How to Build a 20000 vs 40000mAh Power Bank from 26650 Battery at home - How To Make Mini Spot Welder i Using in video : https://www.youtube.com/watch?v=tPuKu5J-_64 - Parts that you need - 26650 Battery 4000mah - Power bank module Thanks for watching, Have a great day !