Xiaomi Smart Band 11: 21-Day Battery, 2,000-nit Display

Think a fitness band can’t be both feather-light and bold? Xiaomi just proved otherwise. The Smart Band 11 slips into the wrist with a curved 1.72-inch AMOLED that punches up to 2,000 nits — bright enough to cut through sunlight without squinting — and a body that’s barely 9.99mm thick.

There’s a pleasing contrast here: delicate silhouette, serious hardware. At 15.58 grams it almost feels like a strap with purpose. Yet inside that slim frame Xiaomi packed sensors for heart rate, SpO2, stress tracking and dedicated female health features. Sleep tracking gets an upgrade too, with HRV analysis and AI-driven sleep insights aimed at turning raw data into something you can actually act on.

What about workouts? The Band 11 covers more than 150 sports modes, from treadmill sprints to open-water swims. And yes — it carries a 5ATM water-resistance rating, so your training won’t stop when you dive in.

• Display: 1.72" AMOLED, 2,000-nit peak brightness, 2mm bezel
• Dimensions & weight: 9.99mm thickness, 15.58g
• Battery life: up to 21 days
• Durability: 5ATM water resistance
• Connectivity & OS: NFC, HyperOS 4; Android and iOS compatible
• Health features: HR, SpO2, stress, HRV sleep; 150+ sports modes

Two standout facts: a 21-day battery and a 2,000-nit AMOLED in a sub-10mm tracker. That combination is rare because brightness usually costs power. Xiaomi balances those trade-offs here, leaning on software and power-efficient hardware to stretch runtime without crippling the display.

NFC support means contactless payments and access-card emulation where Xiaomi enables it. You’ll find phone notifications, music controls and a broad library of watch faces to customize the look. The tracker runs HyperOS 4, keeping the experience consistent with Xiaomi’s ecosystem while remaining compatible with Android and iOS phones.

In China the Smart Band 11 starts at 289 yuan (about $43). The NFC model is 339 yuan (~$50), while ceramic and metal strap editions ring in at 399 yuan (~$60). Reservations are open through Xiaomi’s channels and major e-commerce sites in China, though the company hasn’t confirmed global launch timing yet.

It’s a tidy package: a striking screen, meaningful health upgrades and durability that doesn’t feel like an afterthought. Will it be the band people pick when they want both style and endurance? Probably — if it reaches your market soon.