TECH NEWS – The South Korean tech giant has yet to decide on the battery capacity for its top-of-the-line device next year.

The internal space crunch of the Galaxy S26 Ultra remains, as Samsung will likely have to make room for the S Pen. This would make a silicon-carbon battery a better option for the company. Unfortunately, based on the latest rumors, the cell size of the final product may not differ from that of the Galaxy S25 Ultra or older devices, which still have a 5000 mAh battery. Similarly disappointing are the rumors about fast charging, which suggest that Samsung may limit the power to 45W.

Despite an earlier rumor that both Apple and Samsung are looking into introducing silicon-carbon technology in future devices, Samsung should soon determine to add such batteries to its range of premium smartphones. PandaFlashPro posted a series of disappointing rumors about the Galaxy S26 Ultra on Twitter. The first rumor is that the battery capacity will be below 5,400 mAh, and there will be no 65W fast charging.

Battery Capacity is not Final yet but Under 5400mAh “if” they Increase, Charging Speed not 65w, 120Hz Refresh Rate, No Under Display Camera.

— PandaFlash 𝕏 (@PandaFlashPro) June 8, 2025

Samsung lags behind its Chinese competitors in terms of battery capacity and fast charging. Even the Galaxy S25 Edge was a missed opportunity. A Samsung executive explained that the sleek flagship doesn’t use silicon-carbon batteries because it relies on AI agents to improve efficiency. Assuming the company brings the same software optimizations to the Galaxy S26 Ultra, hardware will soon become a limiting factor.

Samsung estimates that silicon-carbon batteries could increase the Galaxy S26 Ultra’s capacity to 7000mAh while still leaving room for the S Pen. We hope the company adopts this technology soon because customers will find fewer reasons to spend extra money on flagships if they continue to miss out on key features.

Source: WCCFTech