This is the English edition of a review from my Japanese YouTube channel, iestaLife. I review gadgets from my home studio in Japan, so product links go to Amazon Japan.
Quick take
The CIO SMARTCOBY Pro PLUG II 67W3C is a 10,000mAh power bank with folding AC prongs. Plugged into a wall it charges at up to 65W; on battery it still delivers up to 45W, enough for a laptop. It replaces a separate charger, which is exactly what I kept forgetting. The trade-off is capacity: I wish it came in a 20,000mAh version.
What I tested
- CIO SMARTCOBY Pro PLUG II 67W3C (10,000mAh, three USB-C ports, folding AC plug)
- Compared with the UGREEN 20,000mAh power bank with a built-in cable that I had been carrying
- Weight on a kitchen scale, and how well it stays in a wall outlet
What I found
- Why a plug-in battery: I rarely forget my power bank, but I often forget the charger. When I work in a café with an outlet nearby, I end up draining the power bank anyway. This one simply plugs into the wall.
- Size and weight: smaller than the UGREEN in every dimension, but 318 g vs 356 g, so not light. Still, a compact 65W charger alone is around 100 g, so carrying one device instead of two makes sense.
- Stays in the outlet: the lower part of the body rests against the wall, so it does not slowly droop out. With a two-outlet wall plate, use the upper outlet; in the lower one it tilts slightly.
- No cable included: you still need to carry a USB-C cable.
| Item | CIO SMARTCOBY Pro PLUG II | UGREEN 20,000mAh |
|---|---|---|
| Product |  |  |
| Capacity | 10,000mAh | 20,000mAh |
| Max output | 65W (plugged in) / 45W (battery) | 22.5W |
| Weight (my measurement) | 318 g | 356 g |
| Ports | 3× USB-C | Built-in cable |
| Plugs into a wall | Yes | No |
Who it's for
- People who often work in cafés or other places with outlets
- People who tend to forget their charger
- Less ideal if you need several full laptop charges from battery alone
Watch the review
The video is in Japanese. The wall-outlet test starts around 8:30.
Limitations
This is a first-impressions review. I did not measure charging speeds or how far 10,000mAh goes on my MacBook Pro; my guess in the video is about half a charge. The plug is a Japanese (Type A) plug, so check compatibility for your country. No price was shown on Amazon Japan when I recorded.
Products
CIO SMARTCOBY Pro PLUG II 67W3C: on Amazon Japan
UGREEN 20,000mAh power bank with built-in cable: on Amazon Japan
The Amazon Japan links above are affiliate links. As an Amazon Associate, I earn from qualifying purchases. Check the listing for the exact model, current price and shipping availability in your region.
More reviews in English
All Chargers & Cables (29) →Browse all English reviews →
This review is also available in Japanese.