Xiaomi

POCO X8 8 GB + 256 GB Black

Name: POCO X8 8 GB + 256 GB Black
Brand: Xiaomi

Record 8340 mAh battery and 6.83" AMOLED 120 Hz screen for heavy daily use.

Manufacturer reference 4223718623

Colour Black

Black
Orange
White

RAM capacity 8 GB

8 GB
12 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 POCO X8 8 GB + 256 GB Black is worth

The POCO X8 features a silicon-carbon battery rated 8340 mAh, earning a 95/100 autonomy score, far above the market median of 4500 mAh. Its 6.83" AMOLED screen delivers 2772 x 1280 pixels resolution with a 120 Hz refresh rate and up to 3500 nits peak brightness outdoors.

The device combines 8 GB RAM and 256 GB storage with the Snapdragon 6s Gen 4 processor built on 4 nm technology. Photography relies on a 50 MP main sensor with optical image stabilization (OIS), a 2 MP secondary rear camera, and a 16 MP front camera. Fast charging reaches 67 W.

IP66 and IP68 certified, this dual SIM smartphone supports 5G, Wi-Fi 5, Bluetooth 5.1, and contactless payment. Weighing 223 g with an 8.6 mm thickness, it suits users seeking extended battery life and a large, smooth screen for demanding daily 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

8,340 mAh · category median: 4,500 mAh

Screen Good

6.8 " · 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 65.9 KB Document in Français Fiche d’information produit PDF 61.4 KB Document in Français

Specifications

Memory 1

RAM capacity 8 GB

Storage media 1

Internal storage capacity 256 GB

Design 1

Product colour Black

Screen 11

Display diagonal 6.83"

Display resolution 2772 x 1280 pixels

Panel type AMOLED

Maximum refresh rate 120 Hz

Maximum display brightness (Outdoor) 3500 nits

Display brightness 1060 nits

Screen protection Corning Gorilla Glass Victus 2

Pixel density 447 PPI

Touch sampling rate 240 Hz

Colour depth 12-bit

Contrast ratio 8,000,000:1

Camera 9

Rear camera resolution (numeric) 50 MP

Front camera resolution (numeric) 16 MP

Rear camera aperture number 1.8

Image stabilizer Yes

Image stabilizer type OIS

Second rear camera resolution (numeric) 2 MP

Second rear camera aperture number 2.4

Front camera aperture number 2.4

Video recording modes 1080p

Processor 4

Processor model Snapdragon 6s Gen 4

Processor cores 8

Etching technology 4 nm

Maximum processor frequency 2.4 GHz

- 1

Battery capacity 8340 mAh

Representation / rendering 3

Fast charging Yes

Fingerprint reader Yes

Face recognition Yes

Power 2

USB Type-C required charging power (max) 67 W

USB Type-C charging port Yes

Network 8

Mobile network generation 5G

Top Wi-Fi standard Wi-Fi 5 (802.11ac)

Bluetooth Yes

SIM card capability Dual SIM

SIM card type Nano-SIM

Wi-Fi Yes

Bluetooth version 5.1

Near Field Communication (NFC) Yes

Connectivity 1

USB connector type USB Type-C

Navigation 6

GPS (satellite) Yes

GLONASS Yes

BeiDou Yes

Galileo Yes

Quasi-Zenith Satellite System (QZSS) Yes

Electronic compass Yes

Software 1

Operating system installed Xiaomi HyperOS 3

Weight and dimensions 4

Weight 223 g

Height 163.45 mm

Width 78.27 mm

Depth 8.6 mm

Sensors 5

Proximity sensor Yes

Ambient light sensor Yes

Accelerometer Yes

Gyroscope Yes

Infrared emitter Yes

multimedia 1

Speakers stereo

Resistance 1

Protection rating IP66, IP68

Audio 1

Audio technologies Dolby Atmos, Hi-Res

Battery 1

Battery type Silicon-carbon

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 POCO X8 features an 8340 mAh battery, earning it a 95/100 autonomy score. That’s nearly double the market median (4500 mAh), ensuring several days of typical use without charging.

Yes. The AMOLED screen reaches 3500 nits maximum outdoor brightness and 1060 nits in normal use, ensuring excellent readability even under strong direct light.

Yes, the POCO X8 has dual IP66 and IP68 certification, protecting it against powerful water jets and temporary immersion.