TL;DR Realme has revealed a concept phone with a 15,000mAh battery.
The phone is less than 9mm thick and can last for up to five days.
The device uses a battery with 100% silicon content, effectively ruling out mass production for now.
The advent of silicon-carbon batteries has resulted in many smartphone brands offering bigger batteries than ever before. We’ve already seen HONOR and vivo launch phones with ~8,000mAh batteries in relatively slim designs. Now, realme has revealed a rather impressive concept phone.
Realme has announced a concept phone with a 15,000mAh battery. We’ve seen rugged phones with larger batteries, but this typically comes with the side-effect of a thick, heavy design. However, realme manages to fit all this juice into a form factor that doesn’t look like a brick. In fact, the company claims the concept phone is only 8.89mm thick.
Don’t want to miss the best from Android Authority? Set us as a preferred source in Google Search to support us and make sure you never miss our latest exclusive reports, expert analysis, and much more.
In other words, realme’s concept phone offers triple the battery capacity of the Samsung Galaxy S25 Ultra in a chassis that’s 0.7mm thicker. The company also claimed that this battery capacity was almost on par with the combined capacity of the iPhone 12, iPhone 13, iPhone 14, iPhone 15, and iPhone 16 (16,244mAh).
A 15,000mAh battery is larger than some power banks on the market, and realme indeed says you could use reverse wired charging to charge a drone, power a small refrigerator, and more. Otherwise, it says you can expect up to five days of typical usage, 50 hours of video playback, 30 hours of gaming, or three months’ standby time in flight mode.
Would you buy a phone with a 15,000mAh battery? 24 votes Yes, absolutely 67 % Maybe, it depends on the design/safety 33 % No, I wouldn't 0 %
There’s no word on the concept phone’s charging speed, but I imagine that even 120W wired charging would take a few hours. Then again, that seems like a small price to pay for a week of usage.
... continue reading