Xiaomi has introduced the Redmi Band 4 in China, updating its entry-level fitness tracker line with a 60Hz display and a claimed battery life of up to 21 days. The new model succeeds the 2024 Redmi Band 3 and is priced at roughly $25 in its home market.
The Redmi Band 4 uses a unibody design with a metallic-textured frame, 2.5D curved cover glass and a 1.47-inch screen. Its vertically textured strap has a revised pin fastening system intended to hold the band more securely during exercise. The tracker is rated to 5 ATM for water resistance, allowing it to be used while swimming.
Battery life is rated at up to 21 days, compared with the 18-day claim for the Redmi Band 3. Xiaomi says regular health monitoring reduces that figure to around eight days.
- Continuous heart-rate monitoring
- Blood-oxygen monitoring
- Stress tracking
- Sleep tracking
- Women’s health features
- Fifty sport modes, including running, cycling and table tennis
The band also supports message notifications, alarms and watch-face changes. In China, it can handle QR-code payments through WeChat and Alipay, but it appears to drop NFC support. That would be a notable change from the Redmi Band 3, which offered NFC for offline payments in China.
Xiaomi has not announced international availability for the Redmi Band 4, leaving its release plans outside China and the availability of its payment features unresolved.
