Xiaomi

REDMI 15C 4 GB + 128 GB Blue

Name: REDMI 15C 4 GB + 128 GB Blue
Brand: Xiaomi

6.9" screen, 6,000 mAh battery and 33 W charging: autonomy first.

Manufacturer reference 4223711581

Colour Blue

Black
Blue
Green

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 4 GB + 128 GB Blue is worth

The REDMI 15C 4 GB + 128 GB Blue is a 4G smartphone running Xiaomi HyperOS 2, powered by a MediaTek Helio G81-Ultra 8-core processor (2.0 GHz), with 4 GB RAM expandable to 8 GB and 128 GB storage (expandable to 1 TB). Its 6.9" screen displays 1600 x 720 pixels at 120 Hz, reaching 660 nits (810 nits HBM) and a 1200:1 contrast ratio.

On the camera side, the 50 MP rear camera (f/1.8) and 8 MP front camera (f/2.0) offer night mode. The 6,000 mAh battery, rated 93/100, charges at 33 W (50% in 31 minutes) and delivers up to 82 hours of music playback. Storage (45/100) and power (45/100) fall below the market median.

With its 73/100 screen rating, IP64 certification, side fingerprint reader, face recognition and full connectivity (Bluetooth 5.4, Wifi 2.4 GHz and 5 GHz, NFC, multi-satellite GPS, 3.5 mm jack), this 211 g model suits those who prioritise autonomy and a large screen for everyday use without intensive performance needs.

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 65.4 KB Document in Français Fiche d’information produit PDF 61.3 KB Document in Français

Specifications

Design 2

Product colour Blue

Water and dust resistance IP64

Memory 2

RAM capacity 4 GB

Expandable RAM Up to 8 GB

Storage media 3

Internal storage capacity 128 GB

Compatible memory cards Expandable up to 1 TB

Memory type LPDDR4X + eMMC 5.1

Screen 12

Display diagonal 6.9"

Display resolution 1600 x 720 pixels

Maximum refresh rate 120 Hz

Touch sampling rate Up to 240 Hz

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

Contrast ratio 1200:1

Colour gamut 83% NTSC

Colour depth 8-bit, 16.7 million colours

Low Blue Light certification Yes

Flicker Free certification Yes

Circadian Friendly certification Yes

Dimming DC

- 1

Battery capacity 6,000 mAh

Camera 5

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

Network 11

Mobile network generation 4G

Bluetooth Yes

SIM card capability Dual SIM

Wi-Fi Yes

Wi-Fi standards 2.4 GHz | 5 GHz

Bluetooth version 5.4

Near Field Communication (NFC) Yes

2G band GSM: 2/3/5/8

3G band WCDMA: B1/5/8

4G LTE FDD band B1/3/5/7/8/20/28

4G LTE TDD band B38/40/41

Software 1

Operating system installed Xiaomi HyperOS 2

Processor 5

Processor model MediaTek Helio G81-Ultra

Processor cores 8

Maximum CPU frequency 2.0 GHz

CPU architecture Cortex-A75 + Cortex-A55

GPU Mali-G52 MC2

Representation / rendering 4

Fast charging Yes

Fingerprint reader Yes

Face recognition Yes

Wireless charging Yes

Power 1

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

Battery 2

Time to charge to 50% 31 minutes

Reverse charging Yes

Weight and dimensions 4

Weight 211 g

Height 173.16 mm

Width 81.07 mm

Depth 8.20 mm

Sensors 4

Fingerprint reader type Side-mounted

Proximity sensor Yes

Ambient light sensor Yes

Accelerometer Yes

Navigation 5

Electronic compass Yes

GPS (satellite) Yes

GLONASS Yes

Galileo Yes

BeiDou Yes

Connectivity 2

USB connector type USB Type-C

Headphone jack 3.5 mm

Audio 3

Music playback Up to 82 hours

Bluetooth codec AAC/SBC/LDAC

FM radio Yes

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 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.

At 173.16 mm tall and 81.07 mm wide, this REDMI 15C remains large for one-handed use. The 6.9-inch screen offers comfortable viewing, but the 211 g weight and dimensions often require both hands for effortless navigation.

The power rating measures base RAM, 4 GB, against a market median of 8 GB. Even though RAM extends to 8 GB, the starting configuration remains behind for demanding tasks and sustained multitasking.

Yes, the 6,000 mAh battery scores 93/100 for autonomy, well above the market median of 4,500 mAh. The absence of 5G reduces network consumption, and 33 W charging reaches 50% in 31 minutes, reinforcing extended use.