Redmi, Xiaomi's budget-focused sub-brand, has built its reputation on affordable wearables aimed at a broad audience. The latest addition to that lineup, the Redmi Band 4, has now gone official without a major launch event.
The new tracker stands out with higher-quality body materials, curved screen glass and longer battery life compared with its predecessor.
Design and display upgrades
The Band 4 now features a unibody design with metal-textured frames. On the front sits a 1.47-inch panel supporting a 60Hz refresh rate, topped with 2.5D curved protective glass for a smoother touch experience.
The strap gets updates too: a vertically textured band and a revised pin-type buckle, both designed to keep the tracker from sliding around on the wrist during workouts and everyday use.
Up to 21 days of battery life
Battery endurance is the device's biggest selling point. Redmi promises up to 21 days of use on a single charge — three days more than the 18 days offered by the Redmi Band 3. The company notes that with all tracking features running continuously, that figure drops to up to 8 days, and that real-world results will vary depending on usage habits.
Health and fitness features
The tracker covers the standard health toolkit expected at this price point, including all-day stress tracking, heart rate monitoring, blood oxygen measurement, detailed sleep analysis and women's health tracking. Stress changes throughout the day are logged in real time.
On the fitness side, the Band 4 offers 50 workout modes, including running, cycling and table tennis. It also carries a 5ATM water resistance rating. All of this arrives with a $25 price tag.
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