DIY 3x18650 Power Bank Case 3 USB Ports Micro USB Input

DIY 3x18650 Battery Charger Case with 3 USB Output Ports

The DIY 3x18650 Power Bank Case is a practical portable charging enclosure designed for users who want to build a custom power bank using three 18650 flat-head rechargeable batteries. This compact battery case features a solder-free design, allowing quick installation without specialized tools. Equipped with three USB output ports and a Micro USB charging input, it provides a convenient solution for charging smartphones, tablets, Bluetooth devices, Arduino projects, development boards, and other USB-powered electronics.

Whether you are a student, electronics hobbyist, maker, or DIY enthusiast in Bangladesh, this power bank enclosure offers an affordable way to create a reusable portable charging solution. Available from Biggan Project, the case is suitable for educational projects, robotics applications, outdoor activities, emergency backup power, and general everyday use. Its lightweight ABS construction and compact dimensions make it easy to carry in a backpack, toolbox, or travel bag.

The enclosure supports three 18650 batteries with matching specifications and capacity ratings. The built-in charging circuit allows the batteries to be charged through the Micro USB port while providing stable 5V USB output for connected devices. Available in Black, White, Blue, and Pink colors, this DIY power bank shell combines functionality, portability, and ease of assembly for users throughout Bangladesh and the BD electronics community.

Product Specifications

Features

• Supports three 18650 flat-head rechargeable batteries.
• Three USB output ports for charging multiple devices.
• Micro USB input port for convenient battery charging.
• Solder-free installation for easy assembly.
• Compact and lightweight portable design.
• Durable ABS plastic construction.
• Suitable for DIY electronics and portable power projects.
• Available in Black, White, Blue, and Pink colors.
• Easy battery replacement and maintenance.
• Portable backup power solution for daily use.

Applications / Use Cases

• Portable mobile phone charging.
• Emergency backup power source.
• DIY electronics projects.
• Arduino and microcontroller projects.
• Robotics and STEM education activities.
• Travel and outdoor camping use.
• Powering USB-powered gadgets.
• Science fair and engineering projects.
• Workshop and maker-space applications.
• Educational demonstrations in Bangladesh schools and colleges.

User Guide / How to Use

• Open the power bank case carefully.
• Insert three matching 18650 flat-head batteries.
• Ensure correct battery polarity before installation.
• Close the enclosure securely.
• Charge the power bank through the Micro USB input port.
• Connect your device to any USB output port.
• Monitor charging status during operation.
• Store the device in a dry environment when not in use.

Frequently Asked Questions (FAQs)

• Q: Are batteries included with the case?
  A: No, batteries must be purchased separately.
• Q: What type of battery is supported?
  A: The case supports 18650 flat-head rechargeable batteries.
• Q: Can I use batteries with different capacities?
  A: It is recommended to use batteries with identical capacity and specifications.
• Q: How many devices can be charged at once?
  A: Up to three USB-powered devices can be connected simultaneously.
• Q: Does this require soldering?
  A: No, the design allows solder-free installation.
• Q: What charging port is used for recharging the power bank?
  A: A Micro USB input port is used for charging.

Challenges and Considerations

• Only flat-head 18650 batteries should be used.
• Incorrect battery polarity may damage the circuit board.
• All installed batteries should have matching specifications.
• Keep the enclosure away from water and excessive heat.
• Inspect batteries regularly for safe operation.
• Do not mix old and new batteries.

Compatibility

• 18650 flat-head rechargeable batteries.
• Android smartphones.
• iPhones and USB charging devices.
• Bluetooth speakers.
• Wireless earphones.
• Arduino boards and development kits.
• ESP32 and ESP8266 projects.
• USB-powered LED lights.
• Portable electronics and gadgets.

Future Enhancement Options

• Upgrade to higher-capacity 18650 battery cells.
• Add battery protection circuitry if required.
• Integrate a digital battery level indicator.
• Use premium battery cells for longer runtime.
• Create custom portable power solutions for projects.
• Combine with solar charging systems for renewable energy applications.

Benefits

• Cost-effective portable power solution.
• Easy DIY assembly without soldering.
• Reusable and rechargeable design.
• Supports multiple device charging.
• Compact and travel-friendly construction.
• Ideal for students, hobbyists, and makers.
• Suitable for science and robotics projects.
• Reliable backup power source for everyday use.
• Widely useful in Bangladesh educational and electronics communities.

Conclusion

The DIY 3x18650 Power Bank Case is a versatile and practical battery enclosure for creating a custom portable charger. With support for three 18650 batteries, three USB output ports, a Micro USB charging input, and a solder-free design, it offers an excellent solution for students, makers, electronics enthusiasts, and DIY project builders. Available from Biggan Project, this portable charging case is a useful addition to any electronics toolkit in Bangladesh.

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