Product details

Power That Keeps Up With You

Meet the SMARTCOBY Ex04 — a slim, intelligent 5000mAh power bank engineered for the way you actually live. Qi2.2 wireless charging, a built-in USB-C cable, and a semi-solid battery cell that prioritizes both performance and peace of mind. Everything you need. Nothing you don't.

Qi2.2 Wireless Charging — Up to 25W

Built on the magnetic Qi2 standard, the Ex04 delivers up to 25W wireless charging for Qi2.2-compatible devices (iPhone 17 series, Galaxy S26, Pixel 10, and more), and up to 15W for Qi2-compatible devices. Just place your phone and charge — no cables, no fuss. Prefer a cooler charge? Hold the button for 5 seconds to switch to 7.5W Safety Mode.

※ Simultaneous wireless and wired charging is not supported. When charging two devices at once, connect one to the built-in cable and one to the USB-C port (combined output: max 15W). Qi2-incompatible devices will charge via standard Qi.

Semi-Solid Battery Cell — Built for Everyday Confidence

The Ex04 uses a semi-solid battery cell designed with both structural integrity and intelligent control in mind. It's been tested against heat, short circuits, pressure, and drops — and features automatic output control that monitors internal temperature in real time to prevent excessive heat buildup. You can't see it working, but it's always on.

※ "Semi-solid" is defined by CIO's own standards, as no universal definition currently exists.

Built-In USB-C Cable — One Less Thing to Carry

A ~21cm USB-C cable is integrated directly into the body, supporting up to 20W input/output. Charge your phone, earbuds, or even the power bank itself — without ever digging through your bag. The cable is detachable, so if it ever wears out, it's replaceable with any standard USB-C cable.

Slim, Light, and Ready to Go

At just 100 × 70 × 14mm and approximately 151g, the Ex04 slips into a pocket, sacoche, or bag without weighing you down. A rubber-coated surface protects your phone's back from scratches during magnetic attachment, while the thin profile makes it easy to hold alongside your device.

5000mAh — The Right Amount of Power

Enough to charge an iPhone 17 Pro approximately 0.77× wired or 0.66× wirelessly, and an iPhone 16 Pro approximately 0.88× wired or 0.8× wirelessly. Perfect for topping up on the commute or during a long day out. Battery level is displayed in 1% increments on the digital screen — no guessing.

Full Pass-Through Charging

Charge the Ex04 via USB-C while simultaneously charging your device — wired or wirelessly. Once your device is fully charged, the Ex04 resumes charging itself. And once the Ex04 reaches 100%, it cuts power from the battery cell and routes power directly to your device. Use it as a permanent wireless charging pad at your desk, and it'll always be ready when you head out the door.

Core-Level Safety Design

Beyond the semi-solid cell itself, CIO's internal design standards cover expansion clearance, cell partitioning, flame resistance, and heat dissipation. The core cell temperature is designed to stay within 55°C. Real-time thermal monitoring and automatic output control are managed entirely by CIO's proprietary firmware — invisible, but always working to keep your charge safe.

Compatible Devices & Use Cases

• Qi2.2 (25W): iPhone 16 Pro series, iPhone 17 series (including Pro), Pixel 10 Pro XL
• Qi2 (15W): iPhone 15/16 series, iPhone Air, iPhone 17e, Pixel 10 series, and other Qi2-compatible Android devices
• Wired (up to 20W): USB-C smartphones, tablets, earbuds, MacBook Neo, and more

※ Max wired output is 20W — not recommended as a primary charger for iPads or laptops requiring higher wattage. Compliant with Apple Device Accessory Design Guidelines.

CIO Warranty & Support

As a Japanese manufacturer, CIO stands behind every product. If you experience any issues — at unboxing or during use — please reach out to our support team. Having your order number ready will help us resolve things quickly. Note: products are inspected and powered on before shipping, so minor signs of handling may be present. Every unit is brand new and unused.

FAQ

Q: How do I use the button?

A: The button controls the display and mode switching.

  • Press once: Show battery level (%)
  • Press twice: Turn off display
  • Hold 5 seconds: Switch modes

 

Q: What does the display show?

A: The display shows battery level, current mode, and a fast-charging indicator (green lightning bolt above W).

While charging a device: Battery level and mode alternate.

  • Wireless charging: 7 or 25
  • Wired charging: CA
  • Low-current mode: CA → LL

※ If a cable is connected during wireless charging, wired charging takes priority and wireless stops. Display will show CA.

While charging the power bank: Battery % blinks; shows 100 when full.

During pass-through charging: Battery % and PT alternate; shows 100 when fully charged.


Specifications

  • Model: CIO-MB20W2C-SS5K-EX04
  • Size: Approx. 100 × 70 × 14 mm
  • Weight: Approx. 151 g
  • Battery Capacity: 2500mAh/7.4V/18.5Wh
  • Battery Cell: 2500mAh × 2pcs (Total 5000mAh)
  • Ports: USB-C ×2
  • Input: 5V=3A / 9V=2.22A / 12V=1.67A (Max 20W)
  • Output (USB-C): 5V=3A / 9V=2.22A / 12V=1.67A (Max 20W) / PPS 5-11V=2A (Max 22W)
  • Output (Built-in Cable + USB-C): Total 15W (5V=3A)
  • Output (Qi2.2 Wireless): Max 25W
  • Fast Charging Standard: Qi2.2 (25W) / PD3.0
  • Cycle Life: Approx. 400 cycles
  • Charging Time: Approx. 90 min
  • Accessories: Instruction manual (Japanese/English)
Model Number
CIO-MB20W2C-SS5K-EX04
Connector type
USB Type-C
Cable length
21cm
USB specification
USB-C ×2
Rapid charging standard
Qi2.2 (25W) / PD3.0
Accessories
Instruction manual (Japanese/English)
Output
  • USB-C: Max 20W / Built-in Cable + USB-C: Total 15W / Qi2.2 Wireless: Max 25W
Capacity
  • 5000mAh (2500mAh × 2pcs) / 18.5Wh / 7.4V

Compatible models

Wireless charging compatible smartphones: iPhone17 / iPhone Air / iPhone17 Pro / iPhone17 Pro Max / iPhone17e / iPhone16 / iPhone16 Plus / iPhone16 Pro / iPhone16 Pro Max / iPhone15 / iPhone15 Plus / iPhone15 Pro / iPhone15 Pro Max / iPhone14 / iPhone14 Plus / iPhone14 Pro / iPhone14 Pro Max / iPhone13 / iPhone13 Pro / iPhone13 Pro Max / iPhone13 mini / iPhone12 / iPhone12 Pro / iPhone12 Pro Max / iPhone12 mini / Other Qi-compatible Android smartphones

※ This power bank has a USB-C port. Please use a cable compatible with your charging device.

Precautions

• Keep away from heat-generating devices during use.
• Do not leave in direct sunlight, inside a car, or in other high-temperature environments. This may cause heat generation or fire.
• Do not use in environments where heat can accumulate.
• This product is not waterproof. Do not use or store where it may come into contact with water or other liquids.
• Charging may stop at certain temperatures. Allow the product to cool before using again.