Xiaomi

REDMI 15 8 GB + 256 GB Black

Name: REDMI 15 8 GB + 256 GB Black
Brand: Xiaomi

Exceptional 7000 mAh battery and large 6.9-inch screen for extended daily use.

Manufacturer reference 4223711622

Colour Black

Black
Grey
Violet

Energy class View the energy label (PDF)

73 /100 Its best score: the best battery life, rated "very long" on its category’s scale.

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What the REDMI 15 8 GB + 256 GB Black is worth

The REDMI 15 with 8 GB RAM and 256 GB storage stands out for its remarkable battery life. Its 7000 mAh battery, well above the market median of 4500 mAh, earns a battery score of 95/100.

The 6.9-inch screen displays a resolution of 2340 x 1080 pixels with a 144 Hz refresh rate. The 50 MP rear camera matches the market median, while the Qualcomm Snapdragon 685 processor with 8 GB RAM delivers adequate performance (70/100). The 256 GB storage scores 58/100, below the market median of 384 GB.

This smartphone suits users prioritizing extended battery life and a large screen over maximum internal storage. IP64 certified and running Xiaomi HyperOS 2, it handles intensive daily use.

Its scores, criterion by criterion

Scores out of 100, calculated from the datasheet and compared with the market. The full method is public.

Battery life Very long

7,000 mAh · category median: 4,500 mAh

Screen Good

6.9 " · category median: 6.7 "

Camera Good

50 MP · category median: 50 MP

Power Adequate

8 GB · category median: 8 GB

Storage Limited

256 GB · category median: 384 GB

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Documents

What the manufacturer publishes about this model. Each document opens in a new tab.

Étiquette énergie PDF 64.9 KB Document in Français Fiche d’information produit PDF 61.3 KB Document in Français

Specifications

Design 2

Product colour Black

Protection rating IP64

Memory 3

RAM capacity 8 GB

Expandable RAM Up to 16 GB

Memory type LPDDR4X + UFS 2.2

Storage media 2

Internal storage capacity 256 GB

Compatible memory cards Expandable up to 2 TB

Screen 12

Display diagonal 6.9"

Display resolution 2340 x 1080 pixels

Maximum refresh rate 144 Hz

Maximum brightness 850 nits HBM

Typical brightness 700 nits

Colour gamut 85% NTSC

Contrast ratio 1400:1

Touch sampling rate 288 Hz

Pixel density 374 PPI

TÜV Rheinland Low Blue Light certification Yes

TÜV Rheinland Circadian Friendly certification Yes

TÜV Rheinland Flicker Free certification Yes

- 1

Battery capacity 7,000 mAh

Camera 5

Rear camera resolution (numeric) 50 MP

Front camera resolution (numeric) 8 MP

Rear camera aperture number f/1.8

Front camera aperture number f/2

Night mode Yes

Processor 5

Processor model Qualcomm Snapdragon 685

Processor cores 8

Maximum processor frequency 2.8 GHz

Process technology 6 nm

GPU Qualcomm Adreno

Weight and dimensions 4

Weight 224 g

Height 171.08 mm

Width 82.05 mm

Depth 8.55 mm

Software 1

Operating system installed Xiaomi HyperOS 2

Representation / rendering 3

Fast charging Yes

Fingerprint reader Yes

Face recognition Yes

Power 2

USB Type-C required charging power (max) 33 W

Reverse charging 18 W

Navigation 5

GPS (satellite) Yes

GLONASS Yes

Galileo Yes

BeiDou Yes

Electronic compass Yes

Network 10

Bluetooth Yes

SIM card capability Dual SIM

Wi-Fi Yes

Bluetooth version 5.0

Near Field Communication (NFC) Yes

2G bands GSM 2/3/5/8

3G bands WCDMA 1/5/8

4G FDD bands LTE FDD 1/3/5/7/8/20/28

4G TDD bands LTE TDD 38/40/41

Wi-Fi bands 2.4 GHz, 5 GHz

Connectivity 1

USB connector type USB Type-C

Sensors 4

Ambient light sensor Yes

Accelerometer Yes

Proximity sensor Virtual proximity sensor

Infrared emitter Yes

Audio 2

Audio Dolby Atmos

Audio certification Hi-Res Audio

Battery life 1

Energy efficiency class B

Power management 1

Energy efficiency scale A to G

Who this model suits

It’s for you if

Your first criterion is the battery life: it happens to be its best score.

You want a good score on the screen, above its category average.

You prefer a model tracked across several merchants, to buy at the right time.

Skip it if

Its lowest score is on the storage: skip it if that is decisive for you.

Frequently asked questions

Answers drawn from this model’s datasheet.

With 7000 mAh, the REDMI 15 achieves a battery score of 95/100, meaning very long autonomy. This capacity significantly exceeds the market median of 4500 mAh, enabling intensive use over several days without recharging.

The 6.9-inch screen offers a large display area, rated 73/100, slightly above the market median of 6.7 inches. It features 2340 x 1080 pixel resolution with a 144 Hz refresh rate and 850 nits peak brightness, but the device weighs 224 g.

Yes, the REDMI 15 supports memory cards expandable up to 2 TB. The 8 GB RAM is also expandable up to 16 GB through virtual memory technology.