Xiaomi

REDMI 15 8 GB + 256 GB Purple

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

6.9" screen and 7,000 mAh battery for 5-day autonomy.

Manufacturer reference 4223711623

Colour Violet

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 Purple is worth

The Xiaomi REDMI 15 is a smartphone with a 6.9" screen (2340 x 1080 pixels, 144 Hz), 8 GB RAM, 256 GB storage and a 7,000 mAh battery. It runs on a Qualcomm Snapdragon 685 processor (6 nm), features a 50 MP rear camera and an 8 MP front camera. IP64 certified, it weighs 224 g and operates on Xiaomi HyperOS 2.

With a battery score of 95/100, its 7,000 mAh capacity far exceeds the market median (4500 mAh). The screen scores 73/100 thanks to its 6.9" diagonal, above the median (6.7"). Photography reaches 70/100 with 50 MP, matching the market median. Storage at 256 GB scores 58/100, below the median (384 GB), though expandable up to 2 TB.

This model suits users seeking very long battery life and a large screen without flagship pricing. Positioned under 250 €, it covers everyday tasks with 33 W fast charging, dual SIM and GPS, Bluetooth 5.0, NFC sensors.

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 Violet

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.

Yes, the 7000 mAh battery scores 95/100 for autonomy, rated as very long. It significantly exceeds the market median of 4500 mAh, offering over 50% more capacity than most current smartphones.

Yes, the base storage of 256 GB is expandable up to 2 TB via compatible memory card. Additionally, the 8 GB RAM can be extended up to 16 GB through expandable RAM.

Yes, the 6.9-inch screen scores 73/100, rated as good. It displays a resolution of 2340 x 1080 pixels with a 144 Hz refresh rate, maximum brightness of 850 nits and a contrast ratio of 1400:1.