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Samsung Galaxy S27 Ultra Could Launch With Silicon Carbon Battery Upgrade: Report

Samsung Galaxy S27 Ultra Could Launch With Silicon-Carbon Battery Upgrade: Report

Silicon-carbon batteries can store more energy than conventional graphite-based lithium-ion cells, without a considerable increase in size.

Written by Sucharita Ganguly, Edited by David Delima | Updated: 21 April 2026 13:08 IST

Samsung Galaxy S27 Ultra Could Launch With Silicon-Carbon Battery Upgrade: Report

Samsung Galaxy S26 Ultra (pictured) packs a 5,000mAh battery

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Highlights

Samsung evaluates 12,000mAh to 20,000mAh battery prototypes
Samsung explores higher capacity batteries without size increase
Samsung aims to improve battery tech after years of stagnation

Samsung is reportedly preparing a major battery upgrade for its future flagship smartphones, even as the Galaxy S26 Ultra continues with a 5,000mAh battery. The South Korean tech giant is said to be actively testing silicon-carbon battery technology, which could significantly increase capacity without increasing device thickness. The development comes amid growing competition from Chinese brands that have already begun adopting this newer battery chemistry, pushing higher capacities and longer endurance, and increasing pressure on Samsung to accelerate its own transition.

Samsung Plans Major Battery Leap as S27 Ultra Tipped for New Tech

A report by Schrödinger Intel claims internal Samsung SDI documents point to ongoing trials of high-capacity silicon-carbon cells, including 12,000mAh, 18,000mAh, and 20,000mAh prototypes. These designs are said to use advanced stacking methods to fit larger capacities within similar physical dimensions as current batteries. Notably, the same source had previously reported on these testing efforts.

Silicon-carbon batteries can store more energy than conventional graphite-based lithium-ion cells. This allows manufacturers to increase battery capacity without making devices thicker. Several Chinese smartphone brands have already adopted this technology in recent years, although durability remains a challenge.

Some Samsung Galaxy S27 Series Models May Get This Major Storage Upgrade

The report suggests that Samsung's current prototypes fall short of the company's commercial targets for battery lifespan. The tested units reportedly reached around 960 charge cycles, while Samsung aims for closer to 1,500 cycles before wider adoption.

Samsung appears to be taking a cautious approach. The company has maintained the same 5,000mAh battery capacity in its Galaxy S Ultra models for several generations, focusing instead on efficiency improvements. This strategy follows stricter safety standards after past battery-related issues.

Recent comments from Samsung's mobile R&D leadership also indicate internal recognition of the gap in battery innovation. The company has confirmed it is working on next-generation battery technologies, but has not yet approved them for commercial use.

Samsung Galaxy S27 Ultra Tipped to Keep S Pen Support With Digitiser

The report adds that Samsung may introduce silicon-carbon batteries in a future flagship, with the Galaxy S27 Ultra emerging as a likely candidate. If implemented, the shift could mark a significant change in how the company approaches battery capacity and performance.

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Further reading: Samsung Galaxy S27 Ultra, Samsung Galaxy S27 Ultra Features, Samsung Galaxy S27 Ultra Battery Upgrade, Samsung

Sucharita Ganguly

Email Sucharita Ganguly

Sucharita is a writer with Gadgets 360 and is mostly found playing with her cat in her free time. She has previously worked at breaking news desks across organizations. Powered by coffee, The Beatles, Bowie, and her newfound love for BTS, she aims to work towards contributing to a better media environment for women and queer folk. More