Battery capacity remains one of the key considerations when choosing a phone, and new reports indicate that Samsung is developing significantly larger batteries than is currently the case. According to the tipster, the company is testing dual cells based on silicon-carbon technology that reach a capacity of up to 20,000 mAh, which is four times more than the 5,000 mAh on the Galaxy S25 Ultra model.
This technology differs from standard lithium-ion batteries by using a silicon-carbon anode, which allows for higher capacity without a large increase in volume. However, although there were earlier indications that such batteries could appear on the Galaxy S26 series, the latest information indicates that this will not be the case.
Silicon-carbon technology is coming, but not on the Galaxy S26 generation
According to preliminary information, problems with battery inflation still exist and prevent mass production. Samsung has painful experience with battery problems and will not take any chances until the solution is fully stable and secure.
Therefore, no big improvement is expected with the Galaxy S26 Ultra model arriving in February. According to previous announcements, only a modest increase to around 5,200 mAh is possible, which represents a minimal shift compared to its predecessor.
Still, the outlook is optimistic: if development goes according to plan, in the next year or two, phones whose batteries can last two or three days between charges are expected, which would represent one of the biggest changes in the mobile phone industry over the last decade, writes Tech Radar.