Mi Smart Band 4 lasts up to 20 days on a single charge
- Tested using default settings, with 30 minute automatic heart rate monitoring enabled, receiving 100 notifications per day, 2 alarms per day, vibrating for 5 minutes, touching the touch button 10 times per day, and syncing with the app once per day. Actual results may differ due to to differences in environment, use and settings.
Water resistant up to 50m.
40% larger display size in comparison to Mi Band 3.