Redmi Tests Phone With Battery 8500mAh And Thickness Below 8.5mm

Redmi is developing a cellphone with a battery capacity of 8,500mAh. (photo: x @kemji27)

JAKARTA - A new leak reveals that Redmi is developing a phone with a battery capacity of 8,500mAh. This capacity is almost 1000mAh larger than the newly launched Redmi Turbo 4 Pro, which already has a large battery, which is 7550mAh.

More interestingly, the Chinese mobile phone company reportedly managed to keep the body thickness of this cellphone below 8.5mm. In comparison, many phones with smaller batteries actually have the same thickness or even thicker. For example, the Galaxy S25 Ultra has a thickness of 8.2mm with a smaller battery, namely 5000mAh.

A leaked source also said that the Redmi laboratory is still continuing to improve its own artificial battery technology so that battery capacity can be maximized without compromising battery life. This surge in battery capacity cannot be separated from the use of silicon-carbon battery technology, which began to be widely adopted in China this year.

Silicon-Carbon Battery Advantages

In contrast to graphite-based traditional batteries that have a maximum capacity of around 372mAh/g, silicon-based materials can theoretically reach up to 4200mAh/g. Silicon also has better lithium storage capabilities, resulting in higher energy densities and increasing security during charging. The use of silicon material also helps avoid lithium buildup which can cause short circuits.

Thanks to this material change, phones with a battery capacity of 7000mAh or more are now common in China's Android ecosystem. In fact, the battery capacity may not stop at 8,500mAh. In another report, the same source stated that phones with 10000mAh batteries may come as soon as next year.

For now, there is no information on when the Redmi phone with an 8,500mAh battery will be launched or what name will be used.