Realme has once again drawn attention in the smartphone industry by unveiling two ambitious concept devices at the Realme 828 Fan Festival on August 27, 2025. The highlight was a smartphone powered by a 15,000mAh battery, an unprecedented capacity in the market. Alongside it, the company introduced the Chill Fan Phone, a concept model equipped with a built-in cooling fan designed to deliver advanced thermal management.
While these devices are not yet confirmed for commercial release, they showcase Realme’s willingness to experiment with groundbreaking designs. Here’s a closer look at both concept phones.
The 15,000mAh Battery Concept Phone
Unmatched Battery Capacity
The 15,000mAh battery smartphone is Realme’s boldest experiment to date. Most flagship phones today feature batteries in the 5,000mAh range. By tripling that figure, Realme aims to deliver multi-day performance without frequent charging.
Endurance and Usage Metrics
According to Realme, the massive battery can sustain:
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Five days of regular use
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30 hours of gaming sessions
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50 hours of continuous video playback
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Three months on standby in airplane mode
This endurance is complemented by reverse charging support, allowing the phone to double as a power bank for other gadgets.
Slim and Portable Design
Despite the enormous capacity, the phone is only 8.89mm thick. Realme achieved this through silicon-carbon anode technology and a redesigned internal layout that optimizes space. These innovations allow the battery cell to measure just 6.48mm in thickness.
Hardware and Specifications
Leaks and teasers suggest the phone could feature:
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A 6.7-inch OLED display
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MediaTek Dimensity 7300 processor
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12GB RAM with an additional 12GB virtual extension
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256GB internal storage
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Dual-rear camera system
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Support for 80W SuperVOOC fast charging
The phone, reportedly carrying the model number PKP110, is expected to run on Android 15 with Realme UI 6.0.
Vertical Summary Table
Feature |
Details |
|---|---|
Event |
Realme 828 Fan Festival, August 27, 2025 |
Battery Concept Phone |
15,000mAh capacity; 5-day usage; reverse charging; 8.89mm thickness |
Cooling Concept Phone |
Built-in fan, vapor chamber, TEC; up to 6°C cooler than standard designs |
Display |
6.7-inch OLED (Battery Phone) |
Processor |
MediaTek Dimensity 7300 |
Memory/Storage |
12GB RAM (expandable to 24GB virtual), 256GB storage |
Charging |
80W SuperVOOC fast charging (teased) |
OS |
Android 15 with Realme UI 6.0 |
Form Factor |
Metallic frame, curved edges, GT 7T-like camera design |
Production Status |
Concept stage; 10,000mAh variant may launch in 2026 |
Official Site |
The Chill Fan Phone
Advanced Cooling Technology
The Chill Fan Phone explores thermal management with a unique built-in cooling system. It combines three major components:
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Vapor chamber for standard heat dissipation
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Mini cooling fan for air circulation
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Thermoelectric cooler (TEC) that lowers internal temperatures by up to 6°C
Realme claims this multi-layered approach is more effective than conventional cooling systems found in gaming smartphones.
Design Elements
The phone’s design closely resembles the Realme GT 7T, particularly its square-shaped camera module. Promotional material shows a blue variant, with a grille on the side frame suggesting an outlet for airflow. The rear panel curves smoothly along the edges, while the frame sports a metallic finish.
Realme marketed the device as the world’s first smartphone to feature a “built-in AC-like cooling system.”
Concept vs. Consumer Reality
Why These Phones May Remain Concepts
Realme has clarified that these devices are concept models, not commercial products. Their availability will depend on consumer demand and technological feasibility. Nevertheless, Realme is reportedly developing a more practical 10,000mAh version of the battery phone, which may reach the market by 2026.
Significance of the Launch
By unveiling these experimental designs, Realme positions itself as a brand willing to challenge industry norms. The 15,000mAh phone highlights efficiency in energy storage, while the Chill Fan Phone addresses one of the biggest problems in smartphones today heat management. Even if they don’t launch as-is, both devices point to future innovations we may see in commercial handsets.
Frequently Asked Questions (FAQs)
Q1: Will the 15,000mAh Realme phone be available to buy?
A. Not immediately. It is currently a concept model. Realme may release a scaled-down 10,000mAh version by 2026.
Q2: How does Realme keep the 15,000mAh phone so slim?
A. By using silicon-carbon battery technology and a compact internal component layout, allowing for high energy density while maintaining a thickness of just 8.89mm.
Q3: What makes the Chill Fan Phone special?
A. It integrates a mini cooling fan with vapor chamber and TEC technology, lowering internal temperatures by up to 6°C, providing more efficient thermal management than most gaming smartphones.
Q4: How long can the 15,000mAh phone last on a single charge?
A. It is designed for five days of typical usage, 30 hours of gaming, or 50 hours of video playback.
Q5: Can the 15,000mAh phone charge other devices?
A. Yes. It supports reverse charging, meaning it can power other smartphones, earbuds, or wearables.
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