Realme has taken innovation to the next level with its showcase at the 828 Fan Festival 2025, where it introduced two futuristic concepts – a 15,000mAh battery smartphone and the world’s first “Chill Fan” phone. These devices are not only experimental but also highlight Realme’s ambition to push boundaries in smartphone technology. While these phones may not hit the shelves immediately, they hint at the direction mobile tech could take in the coming years.

Realme 15,000mAh Battery Smartphone – A Powerhouse in Your Pocket

At the event, Realme revealed its 15,000mAh battery smartphone, claiming it to be 42% slimmer and 68% lighter compared to a traditional power bank with the same capacity. This is made possible through new battery materials, higher energy density, and advanced packaging technology.

Key Battery Innovations

All-silicon anode battery: The phone uses the world’s first all-silicon anode with 25% silicon content, offering improved efficiency and longer life cycles.

Record-breaking density: With an energy density of 1200Wh/L, this battery holds more power in less space.

Slim profile: Thanks to advanced lamination techniques, the battery measures just 6.48mm, enabling the phone to stay at a sleek 8.89mm thickness despite its massive capacity.

Performance & Endurance

According to Realme, this battery can deliver:

18.45 hours of continuous video recording

30 hours of gaming

50 hours of video playback

5.18 days of general usage on a single charge

3 months standby in airplane mode

Confirmed Specifications

The prototype also revealed some solid smartphone features, including:

6.7-inch OLED display

MediaTek Dimensity 7300 SoC

12GB RAM + 256GB storage

80W SuperVOOC fast charging

Interestingly, this device seems like a refined version of the 10,000mAh concept phone showcased earlier this year. While the 15,000mAh edition may remain experimental for now, reports suggest the 10,000mAh battery variant could hit markets by 2026.

Realme Chill Fan Phone – The World’s First “AC Phone”

The second highlight was the Realme Chill Fan phone, which the company calls the world’s first “AC” smartphone. Designed with hardcore gamers in mind, this device integrates innovative cooling systems to keep performance at its peak.

Cooling Technology

7700mm² VC cooling system with fan-based heat dissipation.

TEC (Thermoelectric Cooler): Uses a semiconductor to lower core temperature by up to 6ºC, offering 2–3 times better cooling compared to standard vapor chambers.

Dynamic design: The IceSense Ultra back panel shifts gradient colors from white to blue when the temperature drops from 45ºC to 38ºC, giving users a visual indicator of cooling.

In testing, Realme achieved a 6.2ºC reduction in device temperature while running a popular anime strategy game at full FPS.

Availability & Future Outlook

While the Chill Fan phone does not have a confirmed release date, it demonstrates Realme’s vision for future gaming smartphones. On the other hand, the 15,000mAh battery phone may remain a concept, but the 10,000mAh version is tipped to arrive in 2026, giving consumers a taste of this battery revolution.

Conclusion

Realme’s showcase at the 828 Fan Festival 2025 proves that the brand is not afraid to challenge industry norms. From record-breaking battery technology to the world’s first AC phone, these innovations highlight the company’s push toward redefining mobile performance and endurance. While commercial availability is still uncertain, the concepts show us what the future of smartphones could look like – longer-lasting, slimmer, and smarter devices built for power users and gamers alike.