- Fujitsu UX-K3 weighs only 634 grams, setting a new global benchmark
- Fujitsu combines carbon fiber and magnesium-lithium for strength without added mass
- The laptop’s WUXGA IPS panel delivers accurate colors and minimal glare
Fujitsu has once again entered the record books with the launch of the new UX-K3, a laptop that weighs just 634 grams.
This model now shares the title of world’s lightest laptop alongside the 2022 Fujitsu Lifebook WU-X/G2 and the 2024 Dynabook Lifebook WU5/J3.
With this release, all three record holders are Japanese-made, each weighing exactly 634 grams – the lightest laptops ever produced.
Design emphasizes weight and durability
The latest model, UX-K3, joins Fujitsu’s FMV Note U series and, unlike previous versions available only online, it will be on display in retail stores for direct hands-on experience.
The FMV UX-K3 maintains its low weight thanks to an unusual mix of materials, as its top panel uses carbon fiber, while the keyboard and base are made of magnesium-lithium alloy.
Despite its lightweight design, this laptop is built to resist bending during normal use.
The included power adapter has also been reduced in size and weight, now at just 151 grams compared to the previous 280 grams.
With these improvements, Fujitsu continues to focus on reducing travel weight for mobile users while maintaining convenient use.
The FMV UX-K3 is powered by an Intel Core Ultra 7 255U processor, featuring a 12-core, 14-thread configuration with integrated Intel graphics and an integrated AI engine rated at 12 TOPS.
This device also comes with 16GB of memory and a 512GB SSD, and uses a 14-inch non-glare WUXGA (1920 x 1200) display with a 16:10 aspect ratio, providing more vertical workspace than the older 16:9 format.
The panel covers the full sRGB color gamut and supports wide-angle IPS technology for consistent colors and brightness at all viewing angles.
Typical brightness reaches around 400 nits, allowing visibility in bright office environments while maintaining low reflectivity thanks to the matte finish.
Wireless connectivity includes Wi-Fi 7 and Bluetooth v5.4, while port layouts include USB Type-C, USB Type-A, HDMI, a microSD slot, and a Gigabit LAN port.
The laptop’s design also includes a Windows Hello-compatible fingerprint sensor and a privacy shutter for the webcam.
Battery life on the Fujitsu UX-K3 laptop is rated at seven hours of video playback and up to 18 hours of idle time.
Priced at around 280,280 yen (around $1,863) on the FMV store, this device is not a budget laptop but is aimed at users who value portability over raw performance.
Fujitsu also introduced the U77-K3, a heavier variant weighing around 869 grams, which offers a larger battery supporting up to 35 hours of battery life.
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