A power bank is very useful for charging mobile phones on the go. In this DIY project, we will make a mini power bank using cardboard and easily available electronic components. This project is low cost and suitable for beginners.
Materials Required
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18650 Li-ion battery
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Power bank boost module (5V USB output)
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Cardboard box
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USB female port
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Power switch
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Connecting wires
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Hot glue / tape
Working Principle
The 18650 battery stores energy. The boost module converts battery voltage to stable 5V output for mobile charging. Cardboard is used as a lightweight protective casing.
Assembly Steps
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Make a small cardboard box for casing
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Fix USB port and switch
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Connect battery to boost module
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Secure all parts with glue
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Test output before use
Safety Tips
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Use a protected 18650 battery
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Do not short-circuit battery
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Never charge without proper charging module
Applications
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Emergency mobile charging
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Travel use
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Student DIY project
Conclusion
This DIY mini power bank is simple, portable, and a good learning project. With proper safety, it can be very useful for daily needs.
⭐ Reviews
⭐⭐⭐⭐⭐
Very useful project and easy to assemble.
⭐⭐⭐⭐☆
Compact design, works well for emergency charging.
💬 Questions for Comments
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Which battery capacity did you use?
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Did your power bank give stable 5V output?
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Would you like a dual USB version tutorial?
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Should I share safety upgrade tips?
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Any improvement suggestions?
Comments
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