Xiaomi

REDMI Note 15 8 GB + 128 GB Black

Name: REDMI Note 15 8 GB + 128 GB Black
Brand: Xiaomi

6.77" giant screen, 6,000 mAh endurance and 108 MP sensor at a tight budget.

Manufacturer reference 4223713454

Colour Black

Black
Blue
Green

Internal storage capacity 128 GB

128 GB
256 GB

RAM capacity 8 GB

6 GB
8 GB

Energy class View the energy label (PDF)

72 /100 Its best score: the best battery life, rated "very long" on its category’s scale.

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What the REDMI Note 15 8 GB + 128 GB Black is worth

The REDMI Note 15 (8 GB + 128 GB Black) leads on endurance with a 6,000 mAh battery, well above the market median of 4,500 mAh, earning a 93/100 battery score. The 6.77" AMOLED screen delivers 2392 x 1080 pixels, 120 Hz refresh rate and 3,200 nits peak outdoor brightness. Photography relies on a 108 MP main sensor with f/1.7 aperture, 6P lens and 1/1.67" sensor size, paired with a 2 MP depth camera and a 20 MP front module.

The 8 GB LPDDR4X RAM, coupled with the MediaTek Helio G100-Ultra processor (8 cores, 2.2 GHz, 6 nm fabrication), ensures a 70/100 power rating in line with the market average. The 128 GB storage (UFS2.2) scores 45/100, reflecting limited capacity against a 384 GB median, yet the hybrid slot supports microSD cards up to 2 TB. Fast charging reaches 33 W, and Xiaomi’s HyperOS 2 wraps the package under Android.

This smartphone targets users prioritising daily stamina and a large, smooth screen without seeking generous storage or 5G. IP64 certification, dual Dolby Atmos and Hi-Res speakers, 4G connectivity (LTE FDD/TDD), dual-band Wi-Fi, Bluetooth 5.3, NFC and a fingerprint reader round out the specification. At 183.7 g and 7.94 mm thick, the body remains manageable despite the extended diagonal.

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

6,000 mAh · category median: 4,500 mAh

Camera Good

108 MP · category median: 50 MP

Screen Good

6.8 " · category median: 6.7 "

Power Adequate

8 GB · category median: 8 GB

Storage Limited

128 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 Black

Protection rating IP64

Memory 2

RAM capacity 8 GB

Memory type LPDDR4X

Storage media 3

Internal storage capacity 128 GB

Compatible memory cards Expandable up to 2 TB

Storage type UFS2.2

Screen 12

Display diagonal 6.77"

Display resolution 2392 x 1080 pixels

Maximum refresh rate 120 Hz

Maximum display brightness (Outdoor) 3,200 nits

Display brightness 800 nits

Colour depth 12 bit

Colour gamut DCI-P3

Contrast ratio 8,000,000:1

Screen-to-body ratio 93%

PWM dimming 3,840 Hz

Touch sampling rate 240 Hz

Brightness adjustment 16,000 levels

Camera 12

Rear camera resolution (numeric) 108 MP

Front camera resolution (numeric) 20 MP

Main camera sensor size 1/1.67"

Rear camera aperture number f/1.7

Main camera lens 6P

Depth camera 2 MP

Front camera aperture number f/2.4

Depth camera sensor size 1/4"

Depth camera lens 4P lens

Front camera aperture f/2.2

Rear camera video recording 1080p at 60 fps

Front camera video recording 1080p at 30 fps

- 1

Battery capacity 6,000 mAh

Representation / rendering 3

Fast charging Yes

Fingerprint reader Yes

Face recognition Yes

Power 1

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

Battery 2

Reverse charging 18 W

Charge cycles 3,000 cycles

Processor 5

Processor model MediaTek Helio G100-Ultra

Processor cores 8

Maximum processor frequency 2.2 GHz

GPU Mali-G57 MC2

Manufacturing process 6 nm

Software 1

Operating system installed Xiaomi HyperOS 2

Network 13

Mobile network generation 4G

SIM card capability Dual SIM

Bluetooth Yes

4G LTE FDD 1/3/5/7/8/20/28

4G LTE TDD 38/40/41

3G WCDMA 1/5/8

2G GSM 850/900/1800/1900 MHz

SIM slot type SIM 1 + Hybrid (SIM or microSD)

Wi-Fi Yes

Wi-Fi standards 802.11a/b/g/n/ac

Wi-Fi bands 2.4 GHz, 5 GHz

Bluetooth version 5.3

Near Field Communication (NFC) Yes

Navigation 5

GPS (satellite) Yes

GLONASS Yes

BeiDou Yes

Galileo Yes

Electronic compass Yes

Sensors 5

Proximity sensor Yes

Ambient light sensor Yes

Accelerometer Yes

Gyroscope Yes

Infrared emitter Yes

multimedia 2

Speakers Dual speaker

Audio Dolby Atmos, Hi-Res

Weight and dimensions 4

Weight 183.7 g

Height 164.03 mm

Width 75.42 mm

Depth 7.94 mm

Connectivity 1

USB connector type USB Type-C

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 camera, 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. With 6,000 mAh, this REDMI Note 15 scores 93/100 for battery life, well above the market median of 4,500 mAh. Expect at least a full day of heavy use, or two days with moderate usage.

Yes, via microSD card up to 2 TB. The SIM 2 slot is hybrid: you choose between a second SIM card or a memory card.

Yes, the refresh rate reaches 120 Hz, and outdoor brightness peaks at 3,200 nits to remain readable in direct sunlight. In everyday use, it holds at 800 nits.