Xiaomi

REDMI 17 4 GB + 128 GB Blue

Name: REDMI 17 4 GB + 128 GB Blue
Brand: Xiaomi

Exceptional 7,500 mAh battery, 6.9" display, 45 W fast charging.

Manufacturer reference 4223717662

Colour Blue

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 17 4 GB + 128 GB Blue is worth

The REDMI 17 4 GB + 128 GB Blue is an entry-level smartphone featuring a 6.9" display with 120 Hz refresh rate, a 50 MP rear camera and a MediaTek Helio G91-Ultra 8-core processor. It runs Xiaomi HyperOS 3 and weighs 232 g.

Its 7,500 mAh battery earns a 95/100 score, far above the market median of 4,500 mAh. The 6.9" screen scores 73/100, the camera 70/100. However, its 4 GB RAM (45/100) and 128 GB storage (45/100) fall short of the median 8 GB and 384 GB. Overall score: 65/100.

This model suits users prioritising battery life and a large screen for video or browsing, without demanding power for heavy apps. 45 W fast charging, IP64 rating and memory expansion up to 2 TB add versatility, but limited RAM will slow intensive multitasking.

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

7,500 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 64.3 KB Document in Français Fiche d’information produit PDF 59.7 KB Document in Français

Specifications

Design 2

Product colour Blue

Resistance IP64

Memory 3

RAM capacity 4 GB

Memory extension Up to 8 GB

Memory type LPDDR4X + eMMC 5.1

Storage media 2

Internal storage capacity 128 GB

Compatible memory cards Expandable up to 2 TB

Screen 11

Display diagonal 6.9"

Display resolution 1600 x 720 pixels

Maximum refresh rate 120 Hz

Touch sampling rate 240 Hz

Display brightness 675 nits typ., 825 nits HBM

Contrast ratio 1400:1

Colour gamut 83% NTSC

Colour depth 8-bit, 16.7 million colours

Protection Corning Gorilla Glass 7i

TÜV Rheinland certifications Low Blue Light, Flicker Free, Circadian Friendly

Dimming DC dimming

Camera 10

Rear camera resolution (numeric) 50 MP

Front camera resolution (numeric) 8 MP

Rear camera aperture number f/1.8

Rear camera lens 5P lens

Front camera aperture number f/2.05

Video recording modes 1080p at 30 fps, 720p at 30 fps

Night mode Yes

Time lapse mode Yes

Rear camera functions FilmCamera, HDR Mode, Portrait Mode, Time-lapse, Dual Camera Recording, Document Mode

Front camera functions HDR Mode, Soft Light Ring, Portrait Mode, Time-lapse, Night Mode, Dual Camera Recording

Processor 6

Processor model MediaTek Helio G91-Ultra

Processor cores 8

CPU architecture Cortex-A75+Cortex-A55

Max. CPU frequency 2 GHz

Process 12 nm

GPU Mali-G52 MC2

- 1

Battery capacity 7,500 mAh

Representation / rendering 3

Fast charging Yes

Fingerprint reader Yes

Face recognition Yes

Power 1

USB Type-C required charging power (max) 45 W

Charge 1

Wired reverse charging 22.5 W

Software 1

Operating system installed Xiaomi HyperOS 3

Network 11

Bluetooth Yes

SIM card type 3-in-2 hybrid SIM + microSD

Wi-Fi Yes

Wi-Fi standards 2.4 GHz, 5 GHz

Bluetooth version 5.4

Bluetooth codecs AAC / SBC / LDAC

Near Field Communication (NFC) Yes

GSM bands 2/3/5/8

WCDMA bands B1/5/8

LTE FDD bands B1/3/5/7/8/20/28

LTE TDD bands B38/40/41

Navigation 5

GPS (satellite) Yes

GLONASS Yes

Galileo Yes

BeiDou Yes

Electronic compass Yes

Connectivity 3

USB connector type USB Type-C

Headphone jack 3.5 mm

FM radio Yes (with headphone jack)

Security 1

Fingerprint sensor type Side-mounted fingerprint sensor

Sensors 4

Ambient light sensor Yes

Proximity sensor Yes

Proximity sensor type Virtual proximity sensor

Accelerometer Yes

Weight and dimensions 4

Weight 232 g

Height 170.12 mm

Width 78.42 mm

Depth 8.8 mm

Video 1

Video encoding HEVC

Playback 2

Supported video formats MP4, 3GP, MKV, WEBM, MPEG2, H.263, MPEG4, H.264, VP8, VP9, AV1

Supported audio formats AAC, M4A, MP4, 3GP, AMR, MID, MIDI, IMY, MP3, OGG, WAV, FLAC, MKV(opus)

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 power: skip it if that is decisive for you.

Frequently asked questions

Answers drawn from this model’s datasheet.

With 7,500 mAh, this REDMI 17 scores 95/100 for battery life, well above the market median of 4,500 mAh. This ensures several days of regular use without recharging.

The 128 GB storage scores 45/100, below the market median of 384 GB. However, the phone accepts a microSD card up to 2 TB via the 3-in-2 hybrid slot.

The 4 GB of RAM score 45/100 for power, below the 8 GB median. Virtual memory extension up to 8 GB partially compensates for everyday tasks, but heavy apps may slow down.