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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
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- USB-C: Max 20W / Built-in Cable + USB-C: Total 15W / Qi2.2 Wireless: Max 25W
- Capacity
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- 5000mAh (2500mAh × 2pcs) / 18.5Wh / 7.4V

