realme Unveils 15,000mAh Concept Phone

realme has introduced a concept smartphone equipped with a massive 15,000mAh battery. The device was unveiled during the brand’s 828 Fan Festival, presented by Senior PR Manager Dongyao Nie.

realme 15000mAh, that’s equivalent to the nearly combined capacities of an iPhone 12, 13, 14, 15, and 16—all together in one device!

Never has there been any phone that can fit a mega 15,000 mAh battery in its body. We made it. pic.twitter.com/cahUNL5dof

— realme Global (@realmeglobal) August 28, 2025

According to realme, the phone is 42% slimmer and 68% lighter than a typical power bank despite its large capacity.

The company says the battery can power up to 25 movies in a row, 30 hours of nonstop gaming, or last as long as three months on flight mode. For everyday use, it is claimed to last up to five days on a single charge.

The technology uses a full-silicon anode material, which realme says allows for the highest energy density achieved so far in a smartphone.

Please note that the device is still a concept. Stay tuned for updates.