Realme Unveils 15000mAh Battery Phone and Chill Fan Phone at 828 Festival

Realme 15000mAh Battery Phone Overview

At the 828 Fan Festival in China, Realme surprised the audience by unveiling a concept smartphone that features an enormous 15,000mAh battery. Positioned as a “portable power station,” this phone is designed not just for long-lasting usage but also to charge other devices such as smartphones and wearables using a wired connection.

Did you watch the livestream just now? During the event, we introduced two groundbreaking concept phones that represent realme's commitment to innovation: the realme 15000mAh, which delivers up to five days of DOU on a single charge, and the realme Chill Fan Phone, which reduces… pic.twitter.com/FfeG5ubm2b

— Chase (@ChaseXu_) August 27, 2025

According to Chase Xu, Vice President of Realme, the phone can allow users to watch up to 25 movies consecutively on a single charge, highlighting the massive endurance potential that exceeds most smartphones available today.

• Up to 18 hours of continuous video recording
• Up to 30 hours of gaming
• Five days of regular usage
• Standby time up to three months in flight mode

Why Such a Massive Battery Matters

The trend in smartphones usually leans towards slimmer designs with smaller battery capacities. Realme’s concept disrupts this by focusing entirely on longevity and utility. For users who travel frequently, attend long outdoor events, or engage in heavy gaming, a device with 15,000mAh capacity could be a game-changer.

Realme Chill Fan Phone Features

Alongside the massive battery phone, Realme introduced the Chill Fan Phone. This concept smartphone is designed to tackle one of the biggest issues in mobile gaming: overheating. The Chill Fan Phone integrates a small, built-in fan that helps cool the device during extended high-performance sessions.

“Realme’s built-in cooling system can reduce the device temperature by up to 6 degrees Celsius, ensuring sustained performance even during intense gameplay,” Chase Xu said during the event.

The fan is integrated with a vent grille on the left frame of the phone, and the device has been informally described as having a “built-in AC inside.” This could potentially set a new standard for thermal management in smartphones.

Practical Benefits of Built-In Cooling

• Reduces thermal throttling during gaming
• Improves overall battery efficiency
• Enhances user comfort by keeping the device cooler

Specifications and Performance Details

While Realme has kept some specifications under wraps, leaks suggest that the 15,000mAh concept phone is running on Android 15-based Realme UI 6.0 and may be powered by a MediaTek Dimensity 7300 processor. It is paired with 12GB RAM, expandable virtually to 24GB, and offers 256GB of storage.

Design, Display, and Colors

The 15,000mAh concept phone sports a 6.7-inch display and a dual-rear camera setup, housed in a silver body that prominently features “15,000mAh” branding. The Chill Fan phone mirrors the Realme GT 7T camera layout and comes in a more saturated blue shade than the IcySense Blue variant.

Teaser images suggest that both concepts are designed to attract attention while demonstrating Realme’s R&D capabilities. These designs are focused more on showcasing technical advancements rather than immediate market appeal.

Concept Phones vs Mass-Market Availability

Both the 15,000mAh phone and Chill Fan phone are concept devices, aimed at showcasing Realme’s research and development prowess. As of now, there is no confirmation regarding their availability for general consumers. These concepts are crucial for gauging public interest and testing the feasibility of innovative features before mass production.

Comparison With Market Devices

• Typical flagship phones range from 4,000–6,000mAh batteries.
• Cooling systems are usually passive, with rare fan integration.
• Realme’s concepts push these limits, creating a niche for enthusiasts and tech experimenters.

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