🔋 DIY Rechargeable Power Bank Battery Storage Box – PD Fast Charging

Build your own rechargeable power bank with this welding-free DIY battery storage case, designed for compatible 18650 or 21700 lithium-ion cells depending on the selected version. The transparent housing gives the unit a distinctive technical appearance while allowing the internal battery arrangement to remain visible.

With USB and Type-C charging options, fast-charging protocol support and built-in LED lighting, it is suitable for DIY electronics projects, portable power applications and outdoor use.

⭐ Key Features

🔧 Welding-Free DIY Assembly
Designed for easy battery installation without soldering or welding. Simply install the correct compatible cells according to the selected version.

🔋 Multiple Battery Configurations
Choose from versions designed for:

• 4 × 21700
• 8 × 21700
• 8 × 18650

⚡ Fast Charging Support
Selected versions support charging and output protocols including PD, QC, SCP, AFC, FCP, PPS and PE, depending on the specific model.

🔌 USB & Type-C Output
Provides convenient power connections for compatible electronic devices. Type-C output supports PD on applicable versions.

💡 Built-In LED Light
Selected models feature an integrated LED outdoor/emergency light, useful for portable illumination.

🖥️ Battery Level Display
The control button can be used to display the remaining battery level on applicable versions.

🛡️ Multiple Protection Functions
Built-in protection features may include overcharge, over-discharge, over-current, over-voltage, short-circuit and over-temperature protection, depending on the selected version.

🔍 Transparent Technical Design
The transparent housing provides a distinctive appearance and allows the internal structure to be visible.

📋 Available Versions

⚠️ Please select the correct battery version when ordering. Battery compatibility differs between models.

⚡ Typical Output Specifications

Depending on the selected version, the available outputs include:

USB Output

• 5V / 3A
• 9V / 2–2.5A
• 12V / 1.5–1.87A
• Maximum output up to approximately 22.5W

Type-C Output

• 5V / up to 3A
• 9V / up to 2.22A
• 12V / up to 1.67A

DC Version – Where Applicable

• Adjustable output: approximately 5V–12V
• Maximum output varies according to voltage and selected version

📌 Actual charging and output specifications depend on the selected model and the battery cells installed.

🔋 Battery Requirements

18650 Version

Use flat-top, unprotected 18650 lithium-ion cells compatible with the case.

21700 Version

Use flat-top 21700 lithium-ion cells compatible with the case.

⚠️ Important:

• Batteries are NOT included.
• Do not use damaged, swollen, leaking or physically compromised cells.
• Do not mix incompatible battery types or cells with substantially different specifications.
• Do not use batteries with unsuitable protective circuits where the case specifically requires unprotected flat-top cells.
• Check the selected version carefully before purchasing.

🛠️ DIY Assembly

1. Ensure the correct compatible batteries are available.
2. Check all cells for damage before installation.
3. Install the batteries according to the polarity markings inside the case.
4. Ensure every cell is seated correctly.
5. Activate/charge the assembled power bank according to the supplied instructions.
6. Check the battery level and output before connecting valuable equipment.

⚠️ Safety Information

Lithium-ion batteries can present a fire, overheating or short-circuit risk if incorrectly installed or handled. Use only compatible cells in good condition and follow the product instructions.

Do not modify, weld or alter the battery housing or electronic circuit. Never intentionally short-circuit the battery contacts. If a cell becomes unusually hot, swollen or damaged, stop using it immediately.

🏕️ Suitable For

✔️ DIY power bank projects
✔️ Electronics enthusiasts
✔️ Portable power applications
✔️ USB device charging
✔️ Outdoor activities
✔️ Emergency lighting
✔️ Camping and travel projects
✔️ DIY electronic builds

📦 Package Includes

• 1 × DIY Power Bank Battery Housing / Kit
• 1 × Accessory Bag

❗ Batteries are NOT included.

📌 Please Note:

• This is a DIY rechargeable battery housing/kit, not a ready-to-use power bank unless compatible batteries are installed.
• The exact ports, output functions, charging protocols and LED functions vary by selected version.
• 4 × 21700, 8 × 21700 and 8 × 18650 versions are not interchangeable.
• Please select the correct model and use only the specified battery type.
• Do not rely on the maximum wattage unless your connected device, cable, battery configuration and selected version all support it.
• Actual battery capacity and runtime depend on the cells installed.