Portable 18650 Power Bank Case – 1-Battery DIY USB Charging Box

Create your own compact portable power bank with this 1-Cell 18650 Battery Power Bank Case. Designed to hold one compatible 3.7V 18650 Li-Ion rechargeable battery, this lightweight charging box provides a convenient DIY solution for powering compatible USB devices.

⭐ Key Features

• 🔋 Single 18650 Battery Holder – Designed for use with 1 × 18650 3.7V Li-Ion rechargeable battery.
• ⚡ 5V USB Output – Provides a 5V DC output for charging/powering compatible USB devices.
• 🔌 Micro USB Input – DC 5V Micro USB input for charging the power bank battery.
• 🪶 Compact & Lightweight – Small portable design measuring approximately 9.5cm long.
• 🎨 Colour Options – Available in White, Black, Yellow, Green, Blue and Pink.
• 🧰 DIY Power Bank Kit – Suitable for creating a simple portable battery-powered USB power source.
• 📱 Wide Device Compatibility – Designed for use with compatible low-power USB devices such as mobile phones, MP3/MP4 players, GPS devices and other suitable equipment.
• 💼 Portable Design – Convenient to carry for travel, outdoor activities and everyday use.

📋 Product Specifications

• Product Type: 18650 Power Bank Case
• Battery Capacity: Depends on the installed 18650 battery
• Battery Type: 1 × 18650 3.7V Li-Ion Rechargeable Battery
• Battery Included: NO
• Input: DC 5V Micro USB
• Output: DC 5V
• Material: Plastic Housing
• Size: Approx. 9.5 × 2.5 × 2cm
• Quantity: 1pc
• Colours: White, Black, Yellow, Green, Blue, Pink

🔋 How It Works

Insert one compatible 18650 rechargeable battery into the case, ensuring the positive (+) and negative (−) terminals are correctly positioned. Once assembled correctly, the case can be connected to a suitable USB device using the available output.

The Micro USB input can be used with a suitable 5V charging source to recharge the installed battery, subject to the specifications of the case and battery.

📱 Suitable For

✔ Compatible mobile devices
✔ MP3 / MP4 players
✔ GPS devices
✔ Other suitable 5V USB equipment
✔ DIY portable power projects
✔ Travel & outdoor use

📦 Package Includes

1 × Portable 18650 Power Bank Case

⚠️ 18650 Battery NOT Included
⚠️ USB Charging Cable NOT Included

⚠️ Important Safety Information

• This is an empty DIY power-bank case; no 18650 battery is supplied.
• Use only one compatible 3.7V 18650 Li-Ion rechargeable battery.
• Check the battery polarity carefully before installation.
• Do not install the battery backwards, as incorrect polarity may damage the unit or create a safety hazard.
• Do not use damaged, swollen or leaking batteries.
• Use a suitable 5V USB charging source and compatible cable.
• Do not short-circuit the battery terminals.
• Do not leave the device charging unattended or near flammable materials.
• Actual charging performance depends on the installed battery, connected device and battery condition.

📌 Please Note

• Please allow approximately 1–3mm measurement variation.
• Colour may vary slightly due to lighting and different monitor settings.
• The power bank's actual capacity depends entirely on the 18650 battery purchased separately.