realme has just revealed two new concept devices at 828 Fan Festival 2025 – a 15000mAh battery phone and an ‘air conditioner‘ phone.
realme 15000mAh Phone and Chill Fan Phone
realme 15000mAh Battery Phone
The 15000mAh battery phone is the first to feature an all-silicon anode battery with 25% silicon. The result of this is a phone that is 42% slimmer and 68% lighter than a power bank of the same capacity.

The battery is also said to have the highest battery energy density of 1200Wh/L and use an advanced lamination. The company claims that it will offer up to 18.45 hours of video shooting, 30 hours of gaming, or up to 50 hours of video playback on a single charge. A single charge is also said to offer up to 5.18 days of use or up to 3 months of standby in airplane mode.

The device is also said to have a 6.7-inch OLED display and be powered by a MediaTek Dimensity 7300 chipset. The processor is coupled with 12GB RAM and 256GB of storage. The monstrous battery is also reported to top up with 80W SUPERVOOC charging.
realme Chill Fan Phone
The Chill Fan phone uses a Thermoelectric Cooler (TEC) in addition to featuring a 7700mm² VC cooling and fan heat dissipation. It also has a tiny semiconductor that can reduce the core temperature by 6ºC.

The device also uses an IceSense Ultra phone back that changes to Blue when it goes below 38ºC.

The company has tested the device and the new technology in a popular anime strategy game in full FPS, and it delivered up to 6.2ºC reduction in temperature.
Although realme didn’t say that these are concept devices, we doubt we’ll see either be mass-produced anytime soon. The 15000mAh battery phone may arrive in a couple of years from now, but for now, we expect these to be concepts.
Ram found his love and appreciation for writing in 2015 having started in the gaming and esports sphere for GG Network. He would then transition to focus more on the world of tech which has also began his journey into learning more about this world. That said though, he still has the mentality of "as long as it works" for his personal gadgets.







