The race to build the ultimate endurance smartphone is heating up. After Honor recently launched the first commercially available phones with 10,000 mAh batteries, a new leak suggests Realme is poised to enter the arena with a device that pushes the boundary by a single, symbolic milliampere-hour. This development marks a significant step towards making the traditional power bank obsolete for many users, promising multi-day usage on a single charge. The focus now shifts to the specifications and potential launch timeline of this behemoth, known by its model number RMX5107.
A Prototype Becomes Reality
Realme first teased the concept of a 10,000 mAh smartphone in a prototype showcase back in May, signaling its ambition to lead in battery technology. While the company followed up by releasing phones with substantial 7,000 mAh batteries, like the flagship GT 8 Pro, the ultimate 10,000 mAh model remained elusive. The recent leak, originating from a Russian tech blog, provides the first concrete image and details of what appears to be the commercial version of that early prototype. This move positions Realme directly against Honor, which just days ago unveiled its Win and Win RT models, claiming the title of first to market.
Context & Competition:
- Realme's Previous Max: 7,000 mAh (e.g., Realme GT 8 Pro, Realme 15T 5G).
- Current Market Leader (by launch date): Honor Win / Win RT (10,000 mAh).
- Key Differentiator (claimed): Realme RMX5107 reportedly has a 1 mAh larger battery than the Honor models.
Key Specifications Unveiled
The leaked image reveals a smartphone running Realme UI 7.0, indicating it will launch with the company's latest software layer. More importantly, the system information screen clearly lists a battery capacity of 10,001 mAh, a figure that intentionally edges out the competition. The device, with model number RMX5107, is shown to be equipped with 12GB of RAM and 256GB of internal storage. While this is likely just one configuration, it sets a high baseline for performance, suggesting Realme is targeting this as a premium offering rather than a budget endurance phone.
Reported Specifications of Realme RMX5107:
- Battery Capacity: 10,001 mAh
- Model Number: RMX5107
- Software: Realme UI 7.0
- Memory (as shown in leak): 12GB RAM, 256GB Storage
- Certifications: Hi-Res Audio, EEC (for Russia)
- Status: Undergoing certification; launch expected soon.
Certification and Imminent Launch
Regulatory filings suggest an official announcement is not far off. The RMX5107 has reportedly received Hi-Res Audio certification, appealing to audiophiles, and has been approved by Europe's EEC (Eurasian Economic Commission) for sale in Russia. These certifications are typically among the final steps before a product launch, hinting that Realme could formally introduce the phone in the coming weeks. This timeline would allow Realme to quickly respond to Honor's recent launch and capture the attention of consumers looking for extreme battery life.
Reshaping Smartphone Design
A jump from Realme's current 7,000 mAh ceiling to over 10,000 mAh represents more than just an incremental upgrade; it challenges mainstream smartphone design principles. Such a large battery will inevitably impact the device's thickness and weight, forcing a trade-off between sleek form and unparalleled function. Realme's decision to proceed signals a bet that a significant segment of users prioritizes battery life above all else. If successful, it could push other manufacturers to explore similar capacities, potentially making ultra-high-capacity batteries a new niche segment in the market.
The Future of Mobile Endurance
As of late December 2025, the battle for the longest-lasting smartphone is officially a two-horse race between Honor and Realme. The leak of the Realme RMX5107 confirms that the 10,000 mAh barrier has been well and truly broken, moving from a prototype novelty to imminent commercial reality. The final specifications, pricing, and real-world performance of this power-centric device remain to be seen, but its existence promises to redefine user expectations for how long a phone can last on a single charge.