DIY Mini Power Bank at Home Using Cardboard

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

• 18650 Li-ion battery

• Power bank boost module (5V USB output)

• Cardboard box

• USB female port

• Power switch

• Connecting wires

• 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

1. Make a small cardboard box for casing

2. Fix USB port and switch

3. Connect battery to boost module

4. Secure all parts with glue

5. Test output before use

Safety Tips

• Use a protected 18650 battery

• Do not short-circuit battery

• Never charge without proper charging module

Applications

• Emergency mobile charging

• Travel use

• 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.

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⭐ Reviews

⭐⭐⭐⭐⭐
Very useful project and easy to assemble.

⭐⭐⭐⭐☆
Compact design, works well for emergency charging.

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💬 Questions for Comments

1. Which battery capacity did you use?

2. Did your power bank give stable 5V output?

3. Would you like a dual USB version tutorial?

4. Should I share safety upgrade tips?

5. Any improvement suggestions?