DIY 3×18650 Battery Power Bank Case with 3 USB Ports

This power bank case lets you build your own charger using three 18650 batteries (not included). Designed for easy use, it requires no welding — just insert your batteries and connect your device to the USB ports for portable power.

Its compact size (22mm x 65mm x 98mm) makes it a practical choice for on-the-go charging needs.

The case ensures secure battery installation: batteries must have the same capacity and be placed correctly to avoid damage (positive sheet and negative spring).

• Welding-free assembly for ease of use
• Built-in motherboard protects against reverse battery installation

Equipped with three USB output ports, this case lets you charge multiple devices simultaneously with a 5V 1A output per port. Just plug and play with your charging cables for instant power wherever you go.

• Output: 5V 1A per USB port
• Compatible with standard USB charging cables

• Input Voltage: 5V 1A
• Output Voltage: 5V 1A
• Battery Type: 18650 lithium-ion cells (3 required)
• Dimensions: 22mm x 65mm x 98mm

Includes one power bank case shell without batteries, ready for your DIY assembly.

• 1 x DIY power bank case (batteries not included)