Xiaomi

Xiaomi 15T 12 GB + 256 GB Black

Name: Xiaomi 15T 12 GB + 256 GB Black
Brand: Xiaomi

6.83" AMOLED screen, 5,500 mAh battery and 67 W fast charging for outstanding endurance.

Manufacturer reference 4223711855

Colour Black

Black
Grey
Rose Gold

Internal storage capacity 256 GB

256 GB
512 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 Xiaomi 15T 12 GB + 256 GB Black is worth

The Xiaomi 15T features 12 GB of RAM and 256 GB of storage, a 6.83" AMOLED screen with 2772 x 1280 pixels resolution and a 120 Hz refresh rate. It runs on a MediaTek Dimensity 8400-Ultra processor built on 4 nm, a 5,500 mAh battery and 67 W fast charging.

With a battery score of 85/100, it clearly exceeds the market median of 4,500 mAh. Its screen scores 72/100 for a diagonal above the 6.7" median, while the camera reaches 70/100 with a 50 MP main sensor. Storage scores 58/100, below the 384 GB median, and performance reaches 80/100 thanks to its 12 GB of RAM.

This model suits users seeking strong battery life and a large display, with IP68 certification, 5G, Wi-Fi 6E and Bluetooth 6.0. It fits those who prioritize battery endurance and screen fluidity for 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

5,500 mAh · category median: 4,500 mAh

Power Adequate

12 GB · category median: 8 GB

Screen Good

6.8 " · category median: 6.7 "

Camera Good

50 MP · category median: 50 MP

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

Specifications

Design 5

Product colour Black

Screen protection Corning Gorilla Glass 7i

IP certification IP68

Water resistance depth 3 m

Vibration motor X-axis linear

Memory 2

RAM capacity 12 GB

RAM type LPDDR5X 8,533 Mbit/s

Storage media 2

Internal storage capacity 256 GB

Storage type UFS 4.1

Screen 11

Display diagonal 6.83"

Display resolution 2772 x 1280 pixels

Display brightness 3,200 nits

Maximum refresh rate 120 Hz

Panel type AMOLED

Pixel density 447 ppi

Colour depth 68 billion colours

Brightness dimming PWM up to 3,840 Hz

Touch sampling rate 480 Hz

Instant touch sampling rate 2,560 Hz

Contrast ratio 5000000:1

Camera 20

Rear camera resolution (numeric) 50 MP

Front camera resolution (numeric) 32 MP

Second rear camera resolution (numeric) 50 MP

Ultra wide-angle camera resolution 12 MP

Rear camera aperture number f/1.7

Second rear camera aperture number f/2.2

Front camera aperture number f/1.9

Main image sensor Light Fusion 800

Main sensor size 1/1.55"

Pixel size 2.0μm

Image stabilizer OIS

Digital zoom 60x

Video recording modes 4K 60 fps, 1080p, 720p

Slow motion mode Yes

Time lapse mode Yes

Night mode Yes

Dynamic range 13.2EV

Main equivalent focal length 23 mm

Ultra wide-angle equivalent focal length 15 mm

Telephoto equivalent focal length 46 mm

- 1

Battery capacity 5,500 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

Battery 2

Full charge time 50 minutes

Battery life cycles 1,600 cycles

Processor 5

Processor model MediaTek Dimensity 8400-Ultra

Manufacturing process 4 nm

CPU architecture 1x Cortex-A725 3.25 GHz, 3x Cortex-A725 3.0 GHz, 4x Cortex-A725 2.1 GHz

GPU Mali-G720

NPU NPU 880

Software 1

Operating system installed Xiaomi HyperOS 2

Weight and dimensions 4

Weight 194 g

Height 163.2 mm

Width 78.0 mm

Depth 7.50 mm

Network 8

Mobile network generation 5G

SIM card capability Dual SIM

SIM card type Nano-SIM, eSIM

Top Wi-Fi standard Wi-Fi 6E

Bluetooth Yes

Wi-Fi Yes

Bluetooth version 6.0

Near Field Communication (NFC) Yes

Navigation 6

GPS (satellite) Yes

Galileo Yes

GLONASS Yes

BeiDou Yes

Quasi-Zenith Satellite System (QZSS) Yes

Electronic compass Yes

Connectivity 1

USB connector type USB Type-C

Sensors 7

Proximity sensor Yes

Ambient light sensor Yes

Accelerometer Yes

Gyroscope Yes

Flicker sensor Yes

Colour temperature sensor Yes

Infrared emitter Yes

multimedia 2

Speakers Dual speaker

Audio Dolby Atmos, Hi-Res

Battery life 1

Energy efficiency class A

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 power, 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 Xiaomi 15T features a 5,500 mAh battery, well above the market median of 4,500 mAh, earning it an autonomy score of 85/100. This capacity ensures extended use, even under intensive conditions, and the 67 W fast charging allows a full recharge in 50 minutes.

Yes, the 6.83-inch AMOLED screen delivers a peak brightness of 3,200 nits, ensuring excellent readability even in bright sunlight. It also offers a 120 Hz refresh rate, 3,840 Hz PWM dimming, and Corning Gorilla Glass 7i protection.

The 50 MP Light Fusion 800 main sensor, with f/1.7 aperture, OIS stabilisation and dedicated night mode, captures detailed images even in low light. The 13.2EV dynamic range ensures good contrast rendering, and the 50 MP telephoto lens completes the setup for versatile photography.