Xiaomi

REDMI 15 5G 8 GB + 256 GB Black

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

Record 7000 mAh battery and large 6.9-inch screen for heavy daily use.

Manufacturer reference 4223711628

Colour Black

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 Black is worth

The REDMI 15 5G 8 GB + 256 GB Black is a smartphone built for endurance, with a 7000 mAh battery far exceeding the market median of 4500 mAh. Its 6.9-inch 144 Hz screen provides ample display space, while 5G and the Snapdragon 6s Gen 3 processor deliver connectivity and responsiveness.

With a battery score of 95/100, it stands out for lasting well beyond a full day. The screen scores 73/100, the camera 70/100 with a 50 MP sensor, and performance 70/100 thanks to 8 GB of RAM. The 256 GB storage, rated 58/100, remains expandable up to 2 TB.

This model suits those who prioritise battery life and a large screen, without requiring the most extensive storage. 33 W fast charging, dual SIM, and IP64 certification complete a profile geared towards 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 64.5 KB Document in Français Fiche d’information produit PDF 61.4 KB Document in Français

Specifications

Design 1

Product colour Black

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.

With a capacity of 7000 mAh, the REDMI 15 5G scores 95/100 for autonomy, qualified as very long. This capacity is significantly higher than the market median of 4500 mAh, allowing intensive use without frequent charging.

The 6.9-inch screen offers a generous display area, with a resolution of 2340 x 1080 pixels and a refresh rate of 144 Hz. The product scores 73/100 for screen, qualified as good. It weighs 224 g and measures 8.55 mm in thickness.

Yes, storage can be expanded up to 2 TB via memory card. The SIM 1 format is hybrid, which means the second slot accepts either a second SIM card or a microSD card.