Xiaomi 17 Ultra review: specs, battery & used prices

Summary

The Xiaomi 17 Ultra is Xiaomi's 2025 super-flagship on the Snapdragon 8 Elite Gen 5, with a 6.9-inch 120 Hz OLED, a 6000 mAh battery with 90 W charging, and an IP68 body at 218 grams. Our catalog scores it 97 on the everyday axis and 99 on gaming, with a camera axis of 60 led by a 50-megapixel stabilized main sensor and a triple array completed by an ultrawide and a periscope telephoto, recording up to 8K30. It launches near $1199 for the 12/512 GB trim, with used 16/1024 GB examples appearing around $1649. The Xiaomi 17 Max is the big-screen sibling, and the Xiaomi 15 Ultra is the previous Ultra generation.

Display and design

The 6.9-inch OLED refreshes at 120 Hz with a 1200-nit peak, an enormous canvas that favors media and split-screen productivity, with brightness sufficient for direct sun. The 218-gram IP68 body manages the huge panel and large optics with the camera module dominating the back, as Ultra tradition demands. This is a two-handed phone by design, and buyers know it.

Performance

The Snapdragon 8 Elite Gen 5 earns a gaming axis of 99 and an everyday axis of 97 in our model, placing the 17 Ultra at the summit of the 2025 performance field: sustained gaming at high frame rates, heavy multitasking and 8K recording all run within its thermal envelope. Storage up to 1 TB suits the capture workloads the camera invites. There is effectively no performance ceiling below its price class.

Camera

The 50-megapixel main sensor with optical stabilization leads a triple array joined by an ultrawide and a periscope telephoto, with video up to 8K30. The camera axis of 60 places it among the strongest camera phones we track, and the Ultra line's photographic identity shows in the optics: this is hardware built for focal-length coverage, not a software simulation of it. Leica-tuned processing keeps the signature contrast controlled.

Battery and charging

The 6000 mAh battery scores 60 on our battery axis, a full demanding day with headroom, remarkable for a phone of this screen size and power class. The 90 W wired charging scores 71 and refills it briskly, with wireless charging supported. Endurance has quietly become an Ultra-line strength rather than the compromise it once was.

Verdict

The Xiaomi 17 Ultra is the maximalist choice of 2025: the best gaming and everyday scores in our catalog, a 6.9-inch canvas and an optics-led camera system, priced accordingly at $1199 and up. Six years of OS support from 2025 plans credibly for a device this expensive. Buyers who want the same platform in a slab should consider the Xiaomi 17 Max; everyone else in this price class is choosing between this and the Oppo Ultra.