Fujitsu FMV UX-K3: The World’s Lightest Laptop with Core Ultra 7

Key Takeaways

1. The Fujitsu FMV UX-K3 is lightweight at 1.4 lbs and slim at 0.7 inches thick, making it one of the lightest laptops available.
2. The laptop has a limited battery capacity of 31Wh, allowing for about seven hours of video playback.
3. It features an Intel Core Ultra 7 255U processor with a boost clock speed of 4.8GHz, along with 16GB of RAM and a 512GB SSD.
4. The 14-inch IPS display has a resolution of 1920 x 1200 pixels and a brightness level of 400 nits, and it includes a 1080p webcam with a privacy shutter.
5. The Fujitsu FMV UX-K3 is priced at approximately $1,860 and is primarily available in Japan, with limited availability elsewhere.


The Fujitsu FMV UX-K3 is designed with a chassis that combines carbon and a magnesium-lithium alloy. Because of this unique construction, the laptop is lightweight at just 1.4 lbs and has a slim profile of only 0.7 inches thick. This puts it on par with the previous year’s Dynabook Lifebook WU5/J3, both sharing the title of the lightest laptop in the world.

Battery Life Considerations

One of the main trade-offs for Fujitsu is the battery capacity. It only provides 31Wh, which limits video playback to about seven hours. The laptop charges through USB-C with a power output of up to 65 watts, and the accompanying power adapter is also quite light, weighing in at merely 0.33 lbs. Regardless of the battery limitations, the laptop should deliver solid performance thanks to its Intel Core Ultra 7 255U processor, which features two performance cores and ten efficiency cores, reaching boost clock speeds of 4.8GHz.

Additional Specs and Features

In terms of additional specifications, this ultrabook comes with 16GB of RAM and a 512GB SSD. The 14-inch IPS display boasts a 16:10 aspect ratio and a resolution of 1920 x 1200 pixels, with a brightness level of 400 nits. On top of that, Fujitsu has included a 1080p webcam with a privacy shutter, along with WiFi 7 and Bluetooth 5.4 support. The laptop is equipped with a variety of ports, including USB-C, two USB-A, HDMI, Ethernet, a 3.5mm headphone jack, and a microSD card reader, making it quite flexible for users.

Pricing and Availability

The Fujitsu FMV UX-K3 ultrabook can be found at the FMV Store Japan for about $1,860. In Europe and various other places, the Fujitsu FMV laptops are generally only accessible through import from Japan.

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