Xiaomi Redmi K40
The Xiaomi Redmi K40 is a balanced everyday device, powered by the Qualcomm SM8250-AC Snapdragon 870 5G (7 nm), suited to light-to-moderate use, with a 4,520 mAh battery for solid all-day use (2021).
2021 · Mid-range · Android 11ⓘ Note: Scores are automatically calculated using available specifications and may not always perfectly reflect real-world performance or user experience.
✓︎ Pros
✓Solid 4,520 mAh battery for all-day use
✓Smooth Qualcomm SM8250-AC Snapdragon 870 5G (7 nm) for daily use and light gaming
✓12GB of RAM — plenty for heavy multitasking and keeping many apps open
✓6.67" OLED/AMOLED display with deep blacks and vibrant colours
⊗ Cons
✗No headphone jack — requires wireless or USB-C audio
⚙️ Performance
Chipset
Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)
Mid-range — handles daily tasks well
CPU
Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)
RAM
12GB | 6GB | 8GB
Heavy multitasking without slowdowns
💻 Display
Sharpness
395 ppi
Sharp and comfortable to read
Panel
Super AMOLED, 120Hz, HDR10+, 1300 nits (peak)
OLED: perfect blacks, vivid colours, power-efficient
📷 Camera
Main Camera
48 MP
Good detail in daylight conditions
Main Video
4K@30fps, 1080p@30/60/120/240/960fps, gyro-EIS
🔋 Battery & Design
Battery
4,520 mAh
Solid day-to-day battery life
Weight
196g
Balanced size and weight
Dimensions
163.7 x 76.4 x 7.8 mm (6.44 x 3.01 x 0.31 in)
Sensors
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass
