[CIO Co., Ltd.] 4.98mm thick. Sales begin for the world's thinnest class power bank 'SMARTCOBY ULTRA SLIM 3K' in Black
CIO Co., Ltd. launched the black version of 'SMARTCOBY ULTRA SLIM 3K', an ultra-thin 4.98mm, 82g power bank with MagSafe and Apple 'Find My' tracking features, priced at 8,980 yen.
📋 Article Processing Timeline
- 📰 Published: April 24, 2026 at 18:15
- 🔍 Collected: April 24, 2026 at 10:01
- 🤖 AI Analyzed: April 24, 2026 at 10:27 (25 min after Collected)
CIO Co., Ltd. (Headquarters: Moriguchi City, Osaka Prefecture, President and CEO: Shota Nakahashi) will begin selling the black color of the world's thinnest class power bank 'SMARTCOBY ULTRA SLIM 3K' for 8,980 yen (tax included) from Friday, April 24, 2026, on Amazon.co.jp, Rakuten Ichiba's CIO official online store, as well as select electronics retailers and the direct-managed CIO STORE. In a project conducted on the crowdfunding service Makuake, we received support purchases from over 3,800 people.
This product features an extremely thin and light design, measuring just 4.98mm in thickness and weighing approximately 82g, bringing a sense of unity 'as if you aren't holding it' even when stacked on a smartphone. It also supports Apple's 'Find My' feature, adding 'peace of mind' to an easily misplaced power bank. Furthermore, it supports MagSafe-compatible Qi wireless charging, USB-C wired charging, and pass-through charging, functioning as a battery right by your side exactly when you need it.
- Product Name: SMARTCOBY ULTRA SLIM 3K
- Color Options: Silver, Black
- Manufacturer's Suggested Retail Price: 8,980 yen (tax included)
- Release Date: Black - Friday, April 24, 2026 (Silver - January 30, 2026)
- Amazon: https://www.amazon.co.jp/dp/B0FTZ41TGY
- Rakuten: https://item.rakuten.co.jp/machinoomise/cio-mb10w1c-3k-uswl7/
We are issuing a launch commemorative campaign code valid until 8:59 AM on April 30. You can purchase it at 10% OFF the regular retail price.
Amazon Promo Code: 9CNYI85T
Rakuten Promo Code: 26Q6-P7BV-BPGZ-7ZWK
Product Features
■ A Design That Thoroughly Focuses on Thinness
A minimalist design with a thickness of 4.98mm and a weight of about 82g. It doesn't protrude or feel bulky even when attached to the back of an iPhone. It is one of the world's thinnest power banks, so thin you'll forget you're carrying it.
To ensure safe usage despite being thin, the casing uses 0.3mm thick high-strength stainless steel. While securing internal protection against bending and impacts, we paid special attention to a finish that leverages the premium feel of the material. The front is matte and the sides are mirror-finished, emphasizing its thinness and luxurious feel. Furthermore, PVD and anti-fingerprint treatments are applied to ensure its beauty lasts.
■ Qi Wireless Output (MagSafe Compatible)
With MagSafe compatibility, 7.5W wireless charging automatically starts just by magnetically snapping it to your smartphone. Because it complies with the Qi standard, compatibility with MagSafe-equipped iPhones is assured. Furthermore, by connecting a USB-C cable, 10W wired charging is also possible, allowing you to use it according to your situation.
■ A 3000mAh Capacity to Carry Just What You Need
The capacity is 3000mAh. Rather than going towards high capacity and heavy weight, it's just the right capacity to lightly solve those moments when 'you're just a little short on power (or feeling anxious)'. As a guide, it provides about 0.4 charges for an iPhone 16, 0.5 charges for an iPhone 15, and 0.55 charges for an iPhone Air via wireless charging. It firmly compensates for that 'little bit missing' while out and about, making it a highly portable, non-bulky power bank.
■ Apple 'Find My' Compatibility
It comes with a built-in anti-loss tag compatible with Apple's Find My. It can be tracked via location verification, notifications, and sound playback from an iPhone, helping prevent accidental loss if kept in your bag. Moreover, even if the power bank's battery runs out, the Find My function operates for about 2 months, and every time you charge the product, the Find My component is charged simultaneously.
*Photos are for illustrative purposes. This product contains built-in magnets. Please do not bring credit cards or IC cards close to or trap them between the device, as magnetic data or chips may be damaged.
Also, prior pairing setup is required to use the Find My feature.
*Find My is a feature certified by Apple Inc.
Product Specifications
About CIO and Inquiries
CIO Co., Ltd. (established in 2017) operates under the philosophy of 'Creating an exciting future with multi-functionality and the latest technology.' Focusing on smartphone-related products such as chargers and power banks, we are dedicated to delivering our own newly manufactured products, infusing a story and passion into each and every one. We want to deliver that childlike feeling of excitement—realizing 'multi-functional, high-performance products are so convenient!' through our products.
This product features an extremely thin and light design, measuring just 4.98mm in thickness and weighing approximately 82g, bringing a sense of unity 'as if you aren't holding it' even when stacked on a smartphone. It also supports Apple's 'Find My' feature, adding 'peace of mind' to an easily misplaced power bank. Furthermore, it supports MagSafe-compatible Qi wireless charging, USB-C wired charging, and pass-through charging, functioning as a battery right by your side exactly when you need it.
- Product Name: SMARTCOBY ULTRA SLIM 3K
- Color Options: Silver, Black
- Manufacturer's Suggested Retail Price: 8,980 yen (tax included)
- Release Date: Black - Friday, April 24, 2026 (Silver - January 30, 2026)
- Amazon: https://www.amazon.co.jp/dp/B0FTZ41TGY
- Rakuten: https://item.rakuten.co.jp/machinoomise/cio-mb10w1c-3k-uswl7/
We are issuing a launch commemorative campaign code valid until 8:59 AM on April 30. You can purchase it at 10% OFF the regular retail price.
Amazon Promo Code: 9CNYI85T
Rakuten Promo Code: 26Q6-P7BV-BPGZ-7ZWK
Product Features
■ A Design That Thoroughly Focuses on Thinness
A minimalist design with a thickness of 4.98mm and a weight of about 82g. It doesn't protrude or feel bulky even when attached to the back of an iPhone. It is one of the world's thinnest power banks, so thin you'll forget you're carrying it.
To ensure safe usage despite being thin, the casing uses 0.3mm thick high-strength stainless steel. While securing internal protection against bending and impacts, we paid special attention to a finish that leverages the premium feel of the material. The front is matte and the sides are mirror-finished, emphasizing its thinness and luxurious feel. Furthermore, PVD and anti-fingerprint treatments are applied to ensure its beauty lasts.
■ Qi Wireless Output (MagSafe Compatible)
With MagSafe compatibility, 7.5W wireless charging automatically starts just by magnetically snapping it to your smartphone. Because it complies with the Qi standard, compatibility with MagSafe-equipped iPhones is assured. Furthermore, by connecting a USB-C cable, 10W wired charging is also possible, allowing you to use it according to your situation.
■ A 3000mAh Capacity to Carry Just What You Need
The capacity is 3000mAh. Rather than going towards high capacity and heavy weight, it's just the right capacity to lightly solve those moments when 'you're just a little short on power (or feeling anxious)'. As a guide, it provides about 0.4 charges for an iPhone 16, 0.5 charges for an iPhone 15, and 0.55 charges for an iPhone Air via wireless charging. It firmly compensates for that 'little bit missing' while out and about, making it a highly portable, non-bulky power bank.
■ Apple 'Find My' Compatibility
It comes with a built-in anti-loss tag compatible with Apple's Find My. It can be tracked via location verification, notifications, and sound playback from an iPhone, helping prevent accidental loss if kept in your bag. Moreover, even if the power bank's battery runs out, the Find My function operates for about 2 months, and every time you charge the product, the Find My component is charged simultaneously.
*Photos are for illustrative purposes. This product contains built-in magnets. Please do not bring credit cards or IC cards close to or trap them between the device, as magnetic data or chips may be damaged.
Also, prior pairing setup is required to use the Find My feature.
*Find My is a feature certified by Apple Inc.
Product Specifications
About CIO and Inquiries
CIO Co., Ltd. (established in 2017) operates under the philosophy of 'Creating an exciting future with multi-functionality and the latest technology.' Focusing on smartphone-related products such as chargers and power banks, we are dedicated to delivering our own newly manufactured products, infusing a story and passion into each and every one. We want to deliver that childlike feeling of excitement—realizing 'multi-functional, high-performance products are so convenient!' through our products.