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. It combines two of my videos on UGREEN’s 20,000 mAh power banks.
Quick take
UGREEN’s compact 20,000 mAh power bank with two built-in USB-C cables (one doubles as a strap) weighed 343.5 g on my scale — about 100 g lighter than UGREEN’s basic 20,000 mAh model at 440.5 g. If you want a large power bank you can carry every day without packing cables, the strap model is the one. I still use three of the basic model, because I like choosing my own cables and it packs neatly.
What I tested
- UGREEN 20,000 mAh power bank with two built-in USB-C cables (strap type), 22.5 W max
- UGREEN 20,000 mAh basic power bank (USB-A ×2, USB-C ×1, no built-in cable), which I have used for a long time and own three of
What I found
- Weight: 343.5 g for the strap model vs 440.5 g for the basic model, weighed side by side. It is thicker but has rounded corners.
- The strap cable will not come off when pulled, but releases easily when you press the base.
- The attached cable can also charge the power bank itself, and pass-through charging worked: I charged an iPhone from it while the power bank was plugged in.
- A button shows the battery percentage with a small face icon; more faces appear as it charges.
- The built-in cables are short, about 12 cm.
- The basic model charged three devices at once, but the earbuds’ light flickered, suggesting it was a little short on power. I regularly use it to top up a MacBook while working; at around 20 W it slows the drain rather than fully keeping up, which in my experience stretches the MacBook’s battery to roughly 1.5×.
- The basic model shows battery level in 1% steps and has survived years in my bag with only scuffs.
Strap model vs basic model
| Strap model | Basic model | |
|---|---|---|
 |  | |
| List price in Japan (at the time of recording) | ¥3,980 | ¥3,980 |
| Weight (my scale) | 343.5 g | 440.5 g |
| Max output | 22.5 W | about 20 W (as I said in the video) |
| Cables / ports | 2 built-in USB-C cables + USB-A | USB-A ×2 + USB-C ×1 |
Who it’s for
- Strap model: you want a 20,000 mAh bank light enough to carry daily, with cables always attached
- Basic model: you prefer your own cable lengths, or carry several banks and want them to stack neatly
- Neither is ideal for charging a MacBook under heavy use; UGREEN also sells a 45 W model with one built-in cable
Watch the reviews
The videos are in Japanese. In the strap-model video, the weight comparison starts around 02:10 and pass-through charging around 05:20.
Limitations
I did not measure charging speeds or capacity; the comments on MacBook charging are from my own use. Model names and availability may differ outside Japan. Prices are Amazon Japan’s list prices at the time of recording.
Products
UGREEN 20,000 mAh power bank with two built-in cables (strap type): on Amazon Japan
UGREEN 20,000 mAh power bank (basic model): on Amazon Japan
UGREEN power bank with built-in cable, 45 W model: 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.