Just ahead of the 828 Fan Festival, realme released yet another teaser online. This time, a prototype smartphone featuring a massive 15000mAh battery. Although the caption did not mention it, the "15000" number can be seen clearly on the device's back cover.
Power That Lasts for Days
According to Realme, the prototype phone can record up to 18.45 hours of video, deliver 50 hours of playback, and last up to 5.18 days with regular use — all on a single charge. While full specs remain under wraps, the battery capacity alone positions this device as one of the most power-packed phones ever teased.
realme 1x000mAh
— realme Global (@realmeglobal) August 25, 2025
Up to 50 hours of video play on a single charge.
Get comfortable, get immersed.
Free to be "lost in the story." pic.twitter.com/16duFgnQzP
Release Day?
The device is expected to be showcased on 27 August 2025, promising ultra-long endurance for users who demand more from their mobile power source.
On the other hand, realme also previously teased another prototype featuring a built-in cooling fan capable of reducing temperatures by up to 6°C. It’s unclear whether this is the same device or part of a broader showcase, but all will be revealed during the 828 Fan Festival.
To read about the built-in cooling fan, you can check out our news coverage right over here. Stay tuned for more trending tech news at TechNave.com.
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