Recommended Semi-Solid State Mobile Batteries
SMARTCOBY Ex04 Wireless2.2 CABLE SS5K
This mobile battery features a thin design of approximately 14mm, supporting up to 25W wireless charging via Qi2.2 and up to 20W wired output. It incorporates semi-solid state battery cells for enhanced safety, reducing flammability. A 22cm detachable USB-C cable is integrated, ensuring users always have a charging cable. With a convenient 5000mAh capacity, it is sized to easily attach to smartphones for portability.
Sale Price: 5,980 JPY (16% OFF)
Product Page: https://www.amazon.co.jp/dp/B0FTZ46NF8
SMARTCOBY Pro SLIM SS
Measuring approximately 16mm thin with a 10,000mAh capacity, this semi-solid state mobile battery offers up to 35W single-port output. It is equipped with two USB-C ports and one USB-A port, allowing simultaneous charging of up to three devices, including smartphones, tablets, and laptops. The device supports pass-through charging, enabling it to charge itself while also powering connected devices. A digital display on the surface provides real-time battery level and charging status information. This model combines usability with the safety and practicality of semi-solid state cells.
Sale Price: 4,980 JPY (21% OFF)
Product Page: https://www.amazon.co.jp/dp/B0GMX4WKYG
SMARTCOBY TRIO 35W SS20000mAh
Offering a large 20,000mAh capacity, this semi-solid state mobile battery provides up to 35W single-port output. Its dimensions are approximately 91×68.8×29.5mm, and it weighs about 320g, making it suitable for travel despite its high capacity. It features two USB-C ports and one USB-A port, supporting simultaneous charging of up to three devices. With up to 35W input for recharging the battery itself, it balances capacity, output, and portability. This model maintains ease of use while incorporating semi-solid state cells for enhanced safety.
Sale Price: 7,480 JPY (19% OFF)
Product Page: https://www.amazon.co.jp/dp/B0GMXGS247
SMARTCOBY TRIO 67W SS20000mAh
This 20,000mAh semi-solid state mobile battery delivers up to 67W single-port output. It includes two USB-C ports and one USB-A port, allowing simultaneous charging of up to three devices. CIO’s proprietary “NovaIntelligence” technology automatically distributes power based on the connected device, optimizing the charging experience. Building on previous models’ features, it integrates semi-solid state cells for increased safety in a high-output, large-capacity design.
Sale Price: 8,880 JPY (19% OFF)
Product Page: https://www.amazon.co.jp/dp/B0GMWVL8FD
SMARTCOBY SLIMⅡ Wireless2.0 SS5K
This next-generation mobile battery aims to reduce the risk of fire compared to traditional lithium-ion polymer batteries. It features Tier1 battery manufacturer semi-solid state cells, which have a proven track record in the smartphone industry. Despite its thin 8.7mm profile, it achieves high safety standards. CIO’s proprietary “NovaSafety S2 (heat suppression firmware)” and new “NovaCore C2 (internal structural design standard)” address the demand for highly safe mobile batteries. It offers Qi2 standard 15W wireless output, 5000mAh capacity, and an aluminum alloy casing.
Sale Price: 5,980 JPY (14% OFF)
Product Page: https://www.amazon.co.jp/dp/B0FTZ1X6NC
SMARTCOBY SLIMⅡ Wireless2.2 SS5K
This 5000mAh semi-solid state mobile battery supports Qi2.2, enabling up to 25W wireless fast charging. It features a slim and lightweight design, measuring approximately 11.6mm thin and weighing about 153g. With Qi2.2 compatibility for up to 25W wireless charging and up to 20W wired output, it offers a balance of safety and portability for a wide range of devices.
Sale Price: 6,280 JPY (14% OFF)
Product Page: https://www.amazon.co.jp/dp/B0GMWW1GFR
SMARTCOBY SLIMⅡ Wireless2.2 Pro SS10K
This 10,000mAh semi-solid state mobile battery supports Qi2.2, providing up to 25W wireless fast charging. In addition to high-speed charging beyond the traditional 15W, it offers selectable 7.5W/25W output and charging with suppressed heat generation. With a thickness of 17mm, it features MagSafe-compliant magnetic attachment. This high-end model combines functionality and practicality with features such as simultaneous charging for two devices, full pass-through charging, and a 1% digital battery level display.
Sale Price: 6,980 JPY (19% OFF)
Product Page: https://www.amazon.co.jp/dp/B0GMWY26HF
Recommended “SMARTCOBY” Series
SMARTCOBY SLIM II Pro 8K
This 8,000mAh mobile battery features a slim and lightweight design, approximately 11mm thin and weighing about 161g, with MagSafe-compliant magnetic attachment. It offers an optimal balance for users who find 5000mAh insufficient and 10000mAh too heavy. With up to 30W wired output, it can charge smartphones, tablets, and some laptops. It also supports full pass-through charging and a low-current mode, making it versatile for daily use, business trips, and travel.
Sale Price: 5,480 JPY (23% OFF)
Product Page: https://www.amazon.co.jp/dp/B0FPLZHNQP
SMARTCOBY SLIM II Wireless 2.2 8K
This 8,000mAh mobile battery is Qi2 certified, supporting up to 25W wireless charging. It is designed to offer an ideal balance for users who find 5000mAh insufficient and 10000mAh too large. The lightweight body, approximately 12mm thin and weighing about 170g, also features up to 30W wired charging. It includes a switchable “high-performance mode” for prioritizing charging speed and a “safety mode” for suppressing heat generation, allowing for optimal charging in various scenarios.
Sale Price: 6,480 JPY (19% OFF)
Product Page: https://www.amazon.co.jp/dp/B0GKPBZ8S4
SMARTCOBY ULTRA SLIM 3K
This is one of the world’s thinnest magnetic mobile batteries, measuring 4.98mm thin and weighing approximately 82g. It is designed to attach seamlessly to an iPhone, allowing for integrated use. It features MagSafe compatibility, Qi wireless charging (up to 7.5W), and a “top-up” capacity of 3000mAh. Furthermore, it supports Apple’s “Find My” function for anti-loss measures, making it an ultra-thin and feature-rich model.
Sale Price: 7,980 JPY (11% OFF)
Product Page: https://www.amazon.co.jp/dp/B0FTZ596XR
The regular prices and discount rates were calculated based on the suggested retail prices on the CIO official website as of June 19, 2026, and rounded.
About CIO Corporation
Established in 2017, CIO Corporation operates with the philosophy of “creating an exciting future with multi-functional and cutting-edge technology.” The company focuses on manufacturing its own brand of smartphone-related products, such as chargers and mobile batteries, each imbued with a unique story and passion. Through its products, CIO aims to deliver the excitement of discovering how convenient multi-functional and high-performance products can be. The entire team is dedicated to providing “exciting new gadgets.”
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CIO Official Website: https://connectinternationalone.co.jp
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CIO Official X: https://x.com/cio_jp_official
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CIO Official YouTube Channel: https://www.youtube.com/c/ciojapan
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CIO Official LINE Account: https://lin.ee/aToNrva
