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
Mobile BOY2 is a 5,000 mAh MagSafe power bank with a small handheld game console built in. It is well made and genuinely fun as a time-killer, but it is much bigger and more than twice the price of a regular 5,000 mAh MagSafe battery.
What I tested
- Mobile BOY2 (landscape model), bought through a Japanese crowdfunding campaign
- A CIO 5,000 mAh MagSafe battery for comparison
- iPhone 17 Pro Max and an Apple Watch
What I found
| Mobile BOY2 | CIO MagSafe battery | |
|---|---|---|
 |  | |
| Capacity | 5,000 mAh | 5,000 mAh |
| Weight (my scale) | 188 g with cable | 121.5 g |
| Price at the time of recording | 10,800 yen (crowdfunding) | under 5,000 yen |
| Games | 300 built in | none |
The games are better than expected. There are about 300 retro-style color games, a speaker with roughly three volume steps, and a reset button that takes you back to the menu. The A button sits below B, which felt odd at first if you are used to Nintendo layouts.
It charges an Apple Watch. Placing my Apple Watch on the MagSafe pad started charging right away, something my CIO battery could not do because of its raised center. The strap doubles as a USB-C cable.
Gaming while charging is not practical. It snaps onto an iPhone 17 Pro Max and charges via MagSafe, but at nearly the size of the phone, holding both and playing is awkward. And every minute of play uses battery you might want for your phone later.
Who it is for
- Parents who want something to hand a bored child instead of their phone
- Gadget fans who carry a power bank anyway and want something playful
- Not for anyone who wants the smallest or cheapest MagSafe battery
Watch the review
The video is in Japanese. Useful chapters: 01:44 size comparison, 02:32 cable strap and Apple Watch charging, 03:55 weight, 05:03 gameplay.
Limitations
At the time of recording, Mobile BOY2 was only available through a Japanese crowdfunding campaign, and the portrait-style first model was the one sold on Amazon Japan. I did not measure charging speed or battery life.
Products
Mobile BOY (first model): on Amazon Japan
Mobile BOY2: crowdfunding page (Japanese)
The Amazon Japan link above is an affiliate link. 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.