The Realme P4 Power is making waves in the smartphone market by pushing battery life to new heights, thanks to its massive 10,001mAh silicon-carbon battery. This capacity is astonishingly large, roughly double that of mainstream flagship phones like the Samsung Galaxy S26 Ultra, which sports a 5,000mAh battery. In fact, it even surpasses other large-battery phones such as the OnePlus 15, which has a 7,300mAh battery, and the RedMagic 11 Pro with 7,500mAh. Such substantial battery sizes are typically found in niche or gaming phones and promise up to two days of use on a single charge, often accompanied by fast charging technologies.
Currently, the Realme P4 Power is available exclusively in India, and it seems unlikely to launch in the US market. Despite boasting one of the largest batteries ever seen in a smartphone, the device is surprisingly affordable, priced at just INR 25,999 (around $285). This makes the phone accessible to a broad audience, unlike many other large-battery devices that tend to come with a premium price tag. For reference, the P4 Power’s battery is only slightly larger than the 10,000mAh battery of the Honor Win, a phone that was released last year but did not receive widespread attention or thorough long-term testing.
I recently had the opportunity to use the Realme P4 Power extensively, inserting my SIM card and using it as my primary device. During this period, I put the phone through CNET’s battery tests, used it for daily tasks, and even employed it as a power bank to charge my iPhone. What stood out immediately was that Realme did not compromise on design or features to accommodate the massive battery, a common issue with other large-battery phones that can feel bulky or unwieldy.
In terms of design, the Realme P4 Power strikes a good balance between size and comfort. While it isn’t the thinnest or lightest phone on the market, it measures 9.1mm thick and weighs 219 grams, making it lighter and slimmer than some large flagship models like the iPhone 17 Pro Max and Google Pixel 10 Pro XL. The phone’s unique “TransView Design” features a translucent section around the camera module that highlights its “Power” branding, giving it a distinct look and feel. The device has curved corners and subtle curves on the back, which contribute to a comfortable grip—a detail that many manufacturers overlook.
The build quality uses a plastic back and frame, while the front is protected by Gorilla Glass 7i, offering solid scratch and impact resistance. Impressively, the P4 Power comes with IP66, IP68, and IP69 dust and water resistance ratings. This means it can survive submersion in freshwater, resist small dust particles, and withstand high-pressure water jets, making it a rugged option for users who need durability alongside battery longevity.
The phone’s display is a 6.8-inch AMOLED panel with a resolution of 2800 x 1280 pixels. It supports a 144Hz refresh rate and can reach brightness levels of 1,800 nits, with peak brightness hitting 6,500 nits for HDR content. These specifications ensure a vibrant and smooth viewing experience. However, to fully enjoy the high resolution and refresh rate, users need to manually enable these settings. In daily use, the screen was easily readable outdoors, and watching videos was enjoyable. That said, one drawback is the lack of stereo speakers; the phone only has a single bottom-firing speaker. While it can get quite loud, using earbuds or headphones is recommended for a richer audio experience, especially when watching movies or playing games.
During my everyday usage, the Realme P4 Power handled common tasks like browsing social media apps Instagram and X, checking emails on Gmail, messaging via WhatsApp and Slack, navigating with Google Maps, and snapping photos without any trouble. The battery comfortably lasted me up to two full days with moderate use and about one and a half days under heavy usage conditions. When it came time to recharge, the included 80-watt charger topped up the battery quickly, minimizing downtime.
To objectively evaluate the battery performance, I ran the Realme P4 Power through CNET’s standardized battery tests. In the 3-hour video streaming test—where video is streamed over Wi-Fi with the screen at full brightness starting