Xiaomi

REDMI 15C 5G 4 GB + 128 GB Black

Name: REDMI 15C 5G 4 GB + 128 GB Black
Brand: Xiaomi

Large 6.9" screen, 6,000 mAh battery, but RAM limited to 4 GB for multitasking.

Manufacturer reference 4223711738

Colour Black

Black
Green
Violet

Internal storage capacity 128 GB

128 GB
256 GB

Energy class View the energy label (PDF)

65 /100 Its best score: the best battery life, rated "very long" on its category’s scale.

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What the REDMI 15C 5G 4 GB + 128 GB Black is worth

The REDMI 15C 5G features a 6.9" Dot Drop display with 120 Hz refresh rate, 6,000 mAh battery, 4 GB RAM expandable to 8 GB, 128 GB storage expandable to 1 TB, 50 MP rear camera and 8 MP front camera. It runs Xiaomi HyperOS 2, supports 5G, Bluetooth 5.4, NFC, and weighs 211 g with IP64 rating.

Battery life scores 93/100 thanks to 6,000 mAh, well above market median (4,500 mAh). Screen earns 73/100 at 6.9" (median 6.7"), camera 70/100 at 50 MP (median 50 MP). However, 4 GB RAM caps at 45/100 (median 8 GB) and 128 GB storage reaches 45/100 (median 384 GB).

This smartphone targets users prioritizing battery life and screen size, willing to accept basic RAM for everyday tasks and storage expandable via microSD card.

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

Screen Good

6.9 " · category median: 6.7 "

Camera Good

50 MP · category median: 50 MP

Storage Limited

128 GB · category median: 384 GB

Power Low

4 GB · category median: 8 GB

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Documents

What the manufacturer publishes about this model. Each document opens in a new tab.

Étiquette énergie PDF 66.7 KB Document in Français Fiche d’information produit PDF 61.3 KB Document in Français

Specifications

Design 2

Product colour Black

Dust and water resistance IP64

Memory 3

RAM capacity 4 GB

Expandable RAM Up to 8 GB

Memory type LPDDR4X + UFS2.2

Storage media 2

Internal storage capacity 128 GB

Compatible memory cards Expandable up to 1 TB

Screen 10

Display diagonal 6.9"

Display resolution 1600 x 720 pixels

Maximum refresh rate 120 Hz

Display brightness 660 nits (typ), 810 nits (HBM)

Display type Dot Drop display

Colour gamut 83% NTSC

Colour depth 8-bit, 16.7 million colours

Contrast ratio 1200:1

Touch sampling rate Up to 240 Hz

Dimming technology DC dimming

- 1

Battery capacity 6,000 mAh

Camera 10

Rear camera resolution (numeric) 50 MP

Front camera resolution (numeric) 8 MP

Rear camera aperture number f/1.8

Front camera aperture number f/2.0

Night mode Yes

Rear camera lens 5P lens

Portrait mode Yes

HDR mode Yes

Time-lapse mode Yes

Ultra HD mode Yes

Network 8

Mobile network generation 5G

Bluetooth Yes

SIM card capability Dual SIM

Wi-Fi Yes

Bluetooth version 5.4

Near Field Communication (NFC) Yes

Wi-Fi bands 2.4 GHz / 5 GHz

NFC Yes

Processor 6

Processor model MediaTek Dimensity 6300

Processor cores 8

Processor technology 6 nm

CPU architecture Cortex-A76 + Cortex-A55

Maximum CPU frequency 2.4 GHz

GPU Mali-G57 MC2

Software 1

Operating system installed Xiaomi HyperOS 2

Weight and dimensions 4

Weight 211 g

Height 173.16 mm

Width 81.07 mm

Depth 8.2 mm

Power 1

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

Representation / rendering 3

Fast charging Yes

Fingerprint reader Yes

Face recognition Yes

Connectivity 3

USB connector type USB Type-C

Headphone jack 3.5 mm

FM radio Yes

Navigation 5

GPS (satellite) Yes

GLONASS Yes

Galileo Yes

BeiDou Yes

Electronic compass Yes

Sensors 4

Ambient light sensor Yes

Accelerometer Yes

Proximity sensor Yes

Vibration motor Yes

Battery 3

Charge cycles (80% capacity) 1,000 cycles

Charging technology Battery Health 3.0

Reverse charging Yes

Audio 2

Audio formats AAC, m4a, mp4, 3GP, AMR, MIDI, imy, MP3, Ogg, wav, FLAC, mkv, Opus, Vorbis, Hi-Res Audio

Bluetooth codecs AAC/SBC/LDAC

Video 3

Video formats mp4, 3gp, AV1, mkv, webm, MPEG-4, H.263, H.264, H.265, VP8, VP9

Rear video recording 1080p at 30 fps

Front video recording 720p at 30 fps / 1080p at 30 fps

Battery life 3

Energy efficiency class A

Music playback Up to 88 hours

Video playback Up to 21 hours

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 power: skip it if that is decisive for you.

Frequently asked questions

Answers drawn from this model’s datasheet.

The REDMI 15C 5G has 4 GB of RAM, half the current market median of 8 GB. This configuration limits performance and results in a 45/100 power score. For everyday tasks like browsing and social media, it remains functional, but intensive multitasking and demanding games will be more constrained. RAM is expandable up to 8 GB.

With 6,000 mAh, the battery far exceeds the 4,500 mAh median and achieves a 93/100 autonomy score, rated as very long. The document indicates music playback up to 88 hours and video playback up to 21 hours. The 33 W fast charging and Battery Health 3.0 technology guarantee 1,000 cycles at 80% capacity.

The 6.9-inch screen scores 73/100, rated as good, with a size larger than the 6.7-inch market median. It displays a 1600 x 720 pixel resolution, 120 Hz refresh rate, 660 nits brightness in normal mode and 810 nits in high brightness mode, with a colour gamut covering 83% of the NTSC space.