Poco X8 Review: 8,340 mAh Battery and a Bright OLED at a Mid-Range Price

This Poco X8 review focuses on the two areas where Xiaomi’s mid-range phone makes its strongest case: endurance and screen quality. Priced at around US$340, the Poco X8 pairs a 6.8-inch OLED panel with an 8,340 mAh battery, a combination that puts it in unusual territory for its class.

Battery life in the Wi-Fi test

The battery figure is the headline. In Notebookcheck’s standardized Wi-Fi test, the Poco X8 ran for almost 30 hours. That result places it well ahead of the Motorola Moto G77, which managed 20 hours in the same test, and far beyond its predecessor, the Poco X7, which reached 17 hours and 30 minutes.

The gap to the X7 is substantial: the older model offers more than 40 percent less battery life. In practical terms, the Poco X8 can last several days without charging under normal use, and it should carry a user through a demanding working day without needing a top-up. The review by Florian Schmitt, published by Notebookcheck, treats this as the phone’s defining strength.

Display brightness and HDR

The 6.8-inch OLED reaches about 1,000 nits in everyday use, which is enough to keep content readable outdoors. In HDR content, small areas of the screen can push up to 4,000 cd/m². The panel also impressed with fast response times and balanced brightness, according to the review.

Those numbers describe peak and typical performance rather than a uniform full-screen brightness, but they indicate a display that is comfortable in bright conditions and capable of punchy highlights when playing HDR material.

PWM, dimming and color accuracy

There are caveats. The display uses a PWM frequency of 125 Hz, with DC dimming above 3,000 Hz superimposed. People who are sensitive to PWM flicker should test the screen before buying, the review advises.

Color accuracy is the other weak point. Deviations peak at 6.86 DeltaE, and reds appear too intense. Professionals may be disappointed by this out-of-the-box performance, though ordinary users are likely to be unaffected. Color reproduction can be adjusted extensively for those who want to tune it.

Who should consider it

The Poco X8 is a sturdy, modern-looking mid-range phone, and its appeal depends on priorities. Buyers who value multi-day battery life and a bright OLED will find a lot to like at this price. Those who need precise color work, or who know they are sensitive to PWM, should look carefully before committing.

The review notes several other criticisms but does not detail them all in the available summary, and no final rating is provided. What is clear is where the Poco X8 stands out: endurance that easily outlasts the Moto G77 and the Poco X7, and a display with strong brightness and fast response.