Redmi Band 4 vs Band 3 specs comparison
There's really not much separating these two. Both have the same 1.47-inch LCD screen, 300mAh battery and pretty much identical health and fitness tracking features. The Band 4 brings a slightly nicer design and a higher maximum battery life claim. If you already own the Band 3, there's very little reason to upgrade.
Full comparison
The full record
76 specifications across 6 areas, with 6 genuine differences.
1. Design & display No clear edge
Fact
Redmi Band 4
Redmi Band 3
Release date
2026-10-20
2024-10-29
Physical size
43.5 × 25.8 × 10.2 mm
45.9 x 26.94 x 9.99 mm
Weight
18 g without strap
16.5 g
Material
Metal-look middle frame; textured strap
Polycarbonate body; silicone strap
Water resistance
5 ATM
5 ATM
Color options
Black, Silver
Black, White, Pink, Yellow, Dark Gray
Display type
TFT LCD
TFT LCD
Display size
1.47 inch
1.47 inch
Display resolution
172 x 320 pixels, 247 ppi
172 x 320 pixels, 247 ppi
Display brightness
Up to 450 nits
Up to 450 nits
2. Battery & charging Redmi Band 4
Fact
Redmi Band 4
Redmi Band 3
Battery
Rechargeable battery; 300 mAh
Rechargeable battery; 300 mAh
Battery life
Up to 21 days (light use); around 8 days (regular monitoring)
Up to 18 days
Charging
Magnetic charging
Magnetic charging
Charging time
Under 2 hours
Under 2 hours
3. Sensors & positioning Even
Fact
Redmi Band 4
Redmi Band 3
GNSS type
None
None
GPS
No
No
GALILEO
No
No
GLONASS
No
No
QZSS
No
No
Beidou
No
No
Accelerometer
Yes
Yes
Gyroscope
Yes
Yes
Barometric altimeter
No
No
Compass
No
No
Geomagnetic
No
No
Ambient light sensor
No
No
Optical heart rate
Yes
Yes
Electrical heart rate
No
No
SpO2
Yes
Yes
Temperature
No
No
Galvanic skin response
No
No
Microphone
No
No
Speakers
No
No
Vibration motor
Yes
Yes
No significant differences in this area.
4. Health & activity Even
Fact
Redmi Band 4
Redmi Band 3
Steps
Yes
Yes
Distance
Yes
Yes
Calories burned
Yes
Yes
Floors
No
No
Sports tracking
Yes (50 sports modes)
Yes (50 sports modes)
Sleep
Yes
Yes
Heart rate
Yes
Yes
HRV
No
No
Stress
Yes
Yes
Blood oxygen
Yes
Yes
Respiration rate
No
No
Skin temperature
No
No
ECG
No
No
Blood pressure
No
No
Body composition
No
No
Glucose
No
No
Hydration level
No
No
UV exposure
No
No
Calorie intake
No
No
Hyperglycemia risk assessment
No
No
Arterial stiffness detection
No
No
Pulse wave arrhythmia analysis
No
No
No significant differences in this area.
5. Smart features Even
Fact
Redmi Band 4
Redmi Band 3
Smartphone compatibility
Android 8.0+ and iOS 12.0+
Android 8.0+ and iOS 12.0+
Operating system at launch
Xiaomi HyperOS
Xiaomi HyperOS
Bluetooth
Yes (5.3)
Yes (5.3)
Wi-Fi
No
No
NFC / connected pay
Yes (China; offline WeChat/Alipay payments)
Yes (China; offline WeChat/Alipay payments)
UWB
No
No
Cellular
No
No
Smartphone notifications
Yes
Yes
Bluetooth calling
No
No
Smartphone music control
Yes
Yes
On-board music storage
No
No
Voice assistant
No
No
No significant differences in this area.
6. Navigation & safety Even
Fact
Redmi Band 4
Redmi Band 3
Maps
No
No
Offline maps
No
No
Navigation
No
No
Emergency SOS
No
No
Satellite SOS
No
No
Fall detection
No
No
LED flashlight
No
No
Diving
No
No
No significant differences in this area.