Samsung is testing big batteries for smartphones. These batteries could have 12,000mAh or 18,000mAh. Today's newest phones, like the Galaxy S26 Ultra, only have 5,000mAh batteries.
Big Numbers, Harder Reality
Internal documents show two battery projects. One project focuses on 12,000mAh. The other aims for 18,000mAh. This is almost four times the S26 Ultra's current battery.
Both new batteries use silicon-carbon technology. This tech helps some Chinese companies make batteries much bigger without adding much weight. A report on digitaltrends.com shared this news.
But, the testing had problems:
The 12,000mAh battery was too thick in early models. Some batteries also showed swelling.
The 18,000mAh battery had a hot cell. The charging management software is also not finished.
An older 20,000mAh battery failed after only 960 charge cycles. The goal was 1,500 cycles. A phone that breaks down before three years is hard to sell.
Samsung Lags in Giant Battery Race
Samsung has not announced any official products or launch dates for these batteries. All work is still in the lab. Big challenges remain.
Samsung made big batteries before. The Galaxy M51 phone in India (2020) had a 7,000mAh battery. It lasted two full days. But Samsung stopped this strategy.
Other companies are moving faster. OnePlus 15R in the US has a 7,400mAh battery. Some phones in India and China have batteries over 10,000mAh. Samsung seems to be focusing on other things.