Chinese smartphone brand Honor launched
what promises to be the world’s thinnest foldable phone—just 4.1 millimeters thick when unfolded—on Wednesday as it seeks to regain lost ground in China’s competitive phone market.
The Magic V5’s thinness is made possible by innovations in its silicon-carbon battery, which stacks cells just 0.2 millimeters thick to create a battery that’s as thin as a bank card.
The new phone is also light: At just 217 grams, the Magic V5 weighs less than the iPhone 16 Pro Max.
Honor says it invested 1 billion Chinese yuan ($139 million) towards researching its silicon-carbon battery technology. The company invests over 10% of its total revenue towards R&D each year.
“In terms of materials, structure, craftsmanship…everything is extremely costly from an R&D perspective,” Hope Cao, Honor’s product expert on foldables, tells
Fortune.
Foldables represent a small but rapidly expanding segment of the Chinese smartphone market. Sales in this category grew by 27% last year, according to Counterpoint Research.
Book-type foldables, which open along the longer edge to create a larger screen, are particularly popular.
Honor was once Huawei’s budget smartphone division. U.S. sanctions forced the Chinese tech giant to offload the company in late 2020.
The company had a 13% share of China’s smartphone market in the first quarter of 2025, according to Counterpoint, close behind Vivo, Oppo and Apple.
—Nicholas Gordon