Xiaomi

REDMI 15 5G 8 GB + 256 GB Grey

Name: REDMI 15 5G 8 GB + 256 GB Grey
Brand: Xiaomi

Giant 7,000 mAh battery and 6.9" 144 Hz screen for record-breaking endurance.

Manufacturer reference 4223711630

Colour Grey

Black
Green
Grey

Internal storage capacity 256 GB

128 GB
256 GB

RAM capacity 8 GB

4 GB
8 GB

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 5G 8 GB + 256 GB Grey is worth

The REDMI 15 5G packs 8 GB of RAM and 256 GB of internal storage in an IP64-rated 224 g body. Its 6.9" screen delivers 2340 x 1080 pixels at 144 Hz, with 700 nits brightness and an 850 nits outdoor peak. The 7,000 mAh battery supports 33 W fast charging and 18 W reverse charging.

The battery far exceeds the market median of 4500 mAh, earning a 95/100 autonomy score. The screen scores 73/100, the camera 70/100 with a 50 MP rear sensor and 8 MP front lens. Storage at 256 GB sits below the 384 GB median, resulting in a 58/100 rating.

This smartphone suits anyone seeking exceptional battery life and a large, fluid screen without top-tier storage or low-light photography. The Snapdragon 6s Gen 3 and Xiaomi HyperOS 2 provide adequate power (70/100) for everyday tasks.

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 64.5 KB Document in Français Fiche d’information produit PDF 61.4 KB Document in Français

Specifications

Design 1

Product colour Grey

Memory 3

RAM capacity 8 GB

RAM memory extension Up to 16 GB

RAM type LPDDR4X

Storage media 3

Internal storage capacity 256 GB

Compatible memory cards Expandable up to 2 TB

Storage type UFS 2.2

Screen 13

Display diagonal 6.9"

Display resolution 2340 x 1080

Maximum refresh rate 144 Hz

Display brightness 700 nits

Maximum display brightness (Outdoor) 850 nits

Colour gamut 85% NTSC

Touch sampling rate 288 Hz

Contrast ratio 1400:1

Pixel density 374 PPI

Low Blue Light certification Yes

Circadian Friendly certification Yes

Flicker Free certification Yes

Wet Touch technology Wet Touch 2.0

- 1

Battery capacity 7,000 mAh

Camera 7

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

Video recording modes 1080p at 30 fps

Lens 5P

Network 7

Mobile network generation 5G

Bluetooth Yes

SIM card capability Dual SIM

Wi-Fi Yes

Bluetooth version 5.1

Near Field Communication (NFC) Yes

SIM card format SIM 1 + hybrid (SIM or microSD)

Processor 4

Processor model Snapdragon 6s Gen 3

Processor cores 8

Manufacturing process 6 nm

Processor frequency 2.3 GHz

Software 1

Operating system installed Xiaomi HyperOS 2

Weight and dimensions 4

Weight 224 g

Height 171.08 mm

Width 82.05 mm

Depth 8.55 mm

Power 2

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

Reverse charging 18 W

Representation / rendering 4

Fast charging Yes

Fingerprint reader Yes

Face recognition Yes

Water and dust resistance IP64

Navigation 5

GPS (satellite) Yes

GLONASS Yes

Galileo Yes

BeiDou Yes

Electronic compass Yes

Sensors 4

Ambient light sensor Yes

Proximity sensor Yes

Accelerometer Yes

Infrared emitter Yes

multimedia 2

Speakers Dolby Atmos

Audio quality Hi-Res Audio

Battery 4

Charge cycles (80%) 1,600 cycles

Battery technology Silicon-carbon anode

Smart charging Smart charging 2.0

Battery health Battery health 4.0

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.

The 7,000 mAh battery scores 95/100 for autonomy, rated as very long. It far exceeds the market median of 4,500 mAh, ensuring several days of normal use without recharging.

Yes, the 144 Hz refresh rate combined with a 288 Hz touch sampling rate delivers high fluidity for gaming and navigation. The screen score of 73/100 confirms good performance on this 6.9-inch display.

Yes, the REDMI 15 5G accepts memory cards up to 2 TB via the hybrid slot that holds either a second SIM or a microSD card. The internal storage of 256 GB is UFS 2.2 type.