Samsung launches Galaxy Z Fold 8 and Z Fold 8 Ultra with silicon-carbon battery technology

Samsung has officially expanded its foldable smartphone portfolio with the release of the Galaxy Z Fold 8 and the Galaxy Z Fold 8 Ultra. The launch marks a shift in the company's design strategy, moving away from a single book-style foldable to offer distinct form factors. The standard Galaxy Z Fold 8 introduces a wider, more compact shape intended to improve ergonomics and video viewing, while the Ultra model retains the traditional, taller design language of its predecessors.

A significant technical update across the new foldable series is the integration of silicon-carbon battery technology. This represents a first for Samsung's mobile division, allowing for higher energy density compared to conventional lithium-ion cells. The technology enables the company to either increase battery capacity within the same physical footprint or maintain capacity while reducing the device's thickness. For instance, the Galaxy Z Fold 8 Ultra houses a 5,000mAh battery in a chassis similar to the previous generation, while the standard Galaxy Z Fold 8 manages a 4,800mAh capacity despite its thinner, wider design.

The new devices are powered by the Snapdragon 8 Elite Gen 5 processor and feature updated display technology, including anti-reflective coatings and improvements to the display crease. Samsung has also focused on physical usability, noting that the new foldables are easier to open than previous iterations. The software experience is built on Android 17, with Samsung promising long-term support for the new hardware.

Market positioning for the new series appears to be a response to the evolving foldable landscape. By introducing the Ultra branding, Samsung is distinguishing its established form factor from the new, wider standard model. The Galaxy Z Fold 8 starts at $1,899.99, a price point that is $100 lower than the previous year's model, while the Ultra variant commands a $200 premium over the standard version.

The adoption of silicon-carbon batteries in these foldables is viewed as a precursor to future hardware developments, particularly for the upcoming Galaxy S27 series. Because silicon-carbon batteries are more complex to manufacture and prone to expansion, their successful implementation in the thin, intricate chassis of a foldable suggests that Samsung has addressed the necessary safety and structural requirements for wider deployment in its flagship slab phones.