On May 11, 2026, SANWA SUPPLY released FAN-USB2BK, a wearable fan called the "2-Way Belt-Clip Fan with Built-in Semi-Solid Battery" that blows air inside the user's clothing[1]. It packs a 3,000 mAh semi-solid battery, delivers a maximum wind speed of 5.7 m/s, and runs for up to roughly 10 hours on a single charge[1]. The list price is 6,160 yen including tax (5,600 yen excluding tax)[1][2].
A 2-way design for belt or neck wear
The product supports two mounting styles: a clip that hooks onto a belt or waistband, and a neck-strap setup using the included strap[1][2]. Hooking the body onto a belt sends airflow efficiently inside clothing, so wearers can stay cooler during light outdoor work or the daily commute while keeping both hands free[1]. The clip rotates a full 360°, and a silicone lining on the inside is designed to grip firmly while avoiding scratches on the attachment surface, holding steady against vibration and gusts[1]. Because the clip is detachable, users can attach the unit to a parasol, a backpack strap, a rack, or any number of other spots to fit the scene[1][2].
A 3,000 mAh semi-solid battery aimed at safety
For the power source, SANWA SUPPLY adopted a semi-solid battery that the company says reduces the risk of leakage and ignition[1]. Semi-solid batteries are a next-generation design in which the electrolyte is reformulated into a gel or near-solid state, and they are generally considered to suppress leakage and thermal runaway more effectively than fully liquid lithium-ion cells; adoption is spreading in the consumer mobile battery space as well[3][4]. SANWA SUPPLY pairs a 3,000 mAh rechargeable cell with this chemistry and pitches the result as a fan users can rely on for outdoor work or commuting through the summer heat[1]. Because the unit is self-contained, it should make for an accessible cooling option for people who would rather skip the bulkier setup of a full fan-equipped work vest.
100-step wind control with an on-board LCD readout
On the airflow side, a high-speed motor pushes out a maximum wind speed of 5.7 m/s[1]. Output can be tuned in 100 steps from 1 % to 100 %, with a 5-step quick selector also available depending on how you operate it[1]. An LCD panel shows the remaining battery level and the current wind level at a glance, making it easy to balance wind speed against runtime to fit the situation[1]. Continuous use is rated at about 10 hours, leaving headroom for extended outdoor work or a full day of summer commuting[1].
The 100-step adjustment range is fine enough that users can dial in a low, quiet breeze on a train or between meetings while still having the strong setting in reserve. Bundling a semi-solid battery, 2-way mounting, and an LCD readout into a 6,160-yen price band feels like a deliberate move to lift this beyond a generic summer accessory[1][2]. On the product page, the fan also appears alongside SANWA SUPPLY's USB-utility lineup and its fan / industrial-fan category, suggesting the company sees it as part of a broader portfolio push[2].
Summary
SANWA SUPPLY's new FAN-USB2BK bundles a 3,000 mAh semi-solid battery, a 5.7 m/s maximum wind speed, 2-way wearable mounting, and 100-step wind control into a 6,160-yen package[1][2]. For people who want to push air inside their clothing without the bulk of a full fan-equipped vest, it shapes up as a compelling summer-heat gadget.
出典:https://www.sanwa.co.jp/info/news/202605/fan-usb2bk/index.html
出典:https://www.sanwa.co.jp/product/syohin?code=FAN-USB2BK
出典:https://www.buffalo.jp/topics/knowledge/detail/semi-solid-state-battery.html
出典:https://powerbanks.jp/semi-solid-battery/
