A few weeks ago, a reliable industry insider reported that Samsung plans to equip the Galaxy S26 series with silicon-carbon batteries, a technology that enables higher capacity without increasing size. Now, Korean publication Fnnews has backed this claim, stating it is “confirmed.” According to the report, the Galaxy S26 Ultra could feature a larger battery, potentially going up to 6,000mAh or beyond.
Galaxy S26 Ultra could feature a 6,000mAh battery
Silicon-carbon batteries are a type of Li-ion (lithium-ion) batteries where the graphite anode is replaced with silicon-carbon materials. This solution is safer and more sustainable. It also has a higher energy density, allowing for bigger batteries while retaining the overall size. The only downside is this is a relatively new technology, so manufacturing silicon-carbon batteries is more expensive than traditional Li-ion batteries.
However, smartphone companies are rapidly adopting it to offer bigger batteries in their devices. Samsung might soon jump on the bandwagon. “In the case of using silicon anode materials, the capacity increases, but there is a problem with the lifespan and needs to be improved,” Fnnews quoted a Samsung official. “Although it has not been confirmed, we are researching various ways to improve it.”
The publication adds that upgrading to silicon-carbon batteries would allow Samsung to pack a 6,000mAh or bigger battery in the Galaxy S26 Ultra next year. That’s a 20% increase in the battery capacity from the Galaxy S25 Ultra’s 5,000mAh. Hopefully, the Korean conglomerate will also offer faster charging, at least 60-65W.
Samsung must have been testing the new battery technology for the past few years. Whether it is finally ready to make the move, we shall find out in the coming months. The Galaxy S26 series will arrive in early 2026. The company also has a super slim Galaxy S25 Edge in the pipeline for April or May this year. It remains to be seen if this phone will use traditional Li-ion batteries or switch to silicon-carbon batteries.
