Japan just got a 999g laptop with a 30-hour battery — and you probably can’t buy it

NEC squeezed a 30-hour battery into a 999 g laptop

by · TechRadar

News By Efosa Udinmwen Published 31 July 2026

(Image credit: PC Watch)

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  • NEC unveiled a 999 g business laptop with exceptional battery endurance
  • LAVIE BM94C uses carbon fibre to achieve a remarkably light business device
  • AI battery management helps extend operating time throughout demanding working days

NEC Personal Computers has unveiled the LAVIE BM94C, a business laptop weighing just 999 g with a starting price of 584,100 yen (about $3,570).

The lightweight notebook is initially launching only in Japan despite attracting attention for combining premium hardware with unusually long battery endurance.

Developed as the flagship model in NEC's latest LAVIE business lineup, the device focuses on portability, durability, and AI-assisted power management.

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Built around portability without compromising battery life

The BM94C was developed under what NEC calls Project 999, an engineering effort balancing an ultra-light chassis with a large battery normally associated with heavier business laptops.

Its body uses laminated aerospace-grade carbon fibre supplied by Toray, while the top panel incorporates the company's ultra-lightweight core technology to improve rigidity without adding unnecessary weight.

NEC also applied fingerprint-resistant and abrasion-resistant coatings, making the notebook easier to clean while reducing visible wear from daily business use.

Power comes from a 99.9 Wh battery rated for approximately 30.5 hours of video playback and around 50.8 hours of idle operation under JEITA 3.0 testing standards.

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