Realme has introduced two groundbreaking concept smartphones during its 828 Fan Festival in China, highlighting the brand’s push toward innovation in battery life and cooling technology.
Although these devices will not be released commercially, they showcase Realme’s advanced research and development efforts.
The first concept phone comes equipped with a massive 15,000mAh battery, designed to deliver up to five days of usage on a single charge. Realme revealed that the device uses a 100% silicon anode battery design, offering four times the capacity of conventional Si-C batteries. With an impressive 1,200 Wh/L energy density, this innovation enables unprecedented performance while keeping the phone just 8.89mm thick.
In terms of endurance, the company claims the device can provide over 50 hours of video playback, 18 hours of video recording, and 30 hours of gaming. The 15,000mAh smartphone can also function as a powerbank thanks to its reverse charging feature. Internally, leaks on Weibo suggest it is powered by MediaTek’s Dimensity 7300 chipset, paired with 12GB RAM and 256GB storage, and sports a 6.7-inch display running Realme UI 6.0 based on Android 15.
The second innovation, dubbed the Realme Chill Fan Phone, focuses on cooling technology for gamers. It features a 10,000mAh battery along with three advanced cooling mechanisms: a 7,700mm² vapor chamber, a spinning fan, and an integrated thermoelectric cooler. According to Realme, this system can lower device temperatures by up to 6°C, ensuring smooth performance and sustained frame rates across more than 20 popular gaming titles.
Visually, the Chill Fan Phone bears resemblance to the Realme GT7 series and incorporates the brand’s IceSense Ultra back panel, which changes color from white to blue as the device cools down.
Although both phones remain concept models, Realme’s showcase demonstrates its ambition to push the limits of battery technology and thermal management in smartphones. These innovations highlight the company’s long-term vision to deliver enhanced performance and durability for future mobile devices.