Celkon A66 vs Xiaomi Redmi Note 9S

Compare recorded specifications, size and practical differences.

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Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

  • Weight

    A66: 111 g lighter

    A66:
    98 g
    Redmi Note 9S:
    209 g
  • Width

    A66: 9.5 mm narrower

    A66:
    67.2 mm
    Redmi Note 9S:
    76.7 mm
  • Screen diagonal

    A66: 2.17 in smaller diagonal

    A66:
    4.5 in
    Redmi Note 9S:
    6.67 in
  • Rear camera layout

    A66:
    Single
    Redmi Note 9S:
    Quad
  • Depth

    Redmi Note 9S: 2.2 mm thinner

    A66:
    11 mm
    Redmi Note 9S:
    8.8 mm
  • Height

    A66: 29.8 mm shorter

    A66:
    136 mm
    Redmi Note 9S:
    165.8 mm

Physical size

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

  1. 1. A66

    Height:
    136 mm
    Width:
    67.2 mm
    Depth:
    11 mm +2.2 mm versus Redmi Note 9S
  2. 2. Redmi Note 9S

    Height:
    165.8 mm +29.8 mm versus A66
    Width:
    76.7 mm +9.5 mm versus A66
    Depth:
    8.8 mm

Weight

Bars start at zero and share a scale within this chart.

  1. 1. A66

    98 g

  2. 2. Redmi Note 9S

    209 g

    +111 g versus A66

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

  1. 1. A66

    Screen diagonal:
    4.5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    55.8 cm²
  2. 2. Redmi Note 9S

    Screen diagonal:
    6.67 in
    Aspect ratio (height:width):
    20:9
    Approximate rectangular screen area:
    107.4 cm²

Redmi Note 9S has approximately 92.4% more rectangular screen area than A66.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Recorded RAM for A66, Redmi Note 9S, compared at the same storage capacity.
StorageA66Redmi Note 9S
64 GB Unknown 4 GB RAM
128 GB Unknown 6 GB RAM
A66: Original memory entry

4 GB · 512 MB RAM

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. A66

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB

2. Redmi Note 9S

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSDXC (dedicated slot)

Battery capacity

Capacity is not battery life. No endurance test is implied.

Recorded battery capacity

Bars start at zero and share a scale within this chart.

  1. 1. A66

    2000 mAh

  2. 2. Redmi Note 9S

    5020 mAh

    +3020 mAh versus A66

Specifications

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

1. A662. Redmi Note 9S

Everyday essentials
Everyday essentials — specifications for A66, Redmi Note 9S.
SpecificationA66Redmi Note 9S
Dimensions (HxWxD)
  • 136 Х 67.2 Х 11 mm
  • 165.8 Х 76.7 Х 8.8 mm
Weight
  • 98 g
  • 209 g
Technology
  • TFT
  • IPS LCD
Screen size
  • 4.5" inch
  • 6.67" inch
Screen resolution
  • 480 x 854 px
  • 1080 x 2400 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 4 GB
  • 512 MB RAM
  • 64GB 4GB RAM
  • 128GB 6GB RAM
Memory card support
  • microSD
  • up to 32 GB
  • microSDXC (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 2000 mAh
  • Li-Ion
  • 5020 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 4.1.2 (Jelly Bean)
  • Android 10.0; MIUI 11
Chipset Unknown
  • Qualcomm SM7125 Snapdragon 720G (8 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for A66, Redmi Note 9S.
SpecificationA66Redmi Note 9S
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors Unknown
  • 16M
Screen area
  • 55.8 cm2
  • 107.4 cm2
Screen format
  • 16:9 (height:width)
  • 20:9 (height:width)
Screen to body ratio
  • 61.1%
  • 84.5%
PPI /points per inch/
  • 218 PPI
  • 395 PPI
Screen protection Unknown
  • Corning Gorilla Glass 5
Camera and Video
Camera and Video — specifications for A66, Redmi Note 9S.
SpecificationA66Redmi Note 9S
Rear camera, main
  • 3.15 MP
  • Single
  • 48 MP
  • Quad
Camera specs
  • 3.15 MP
  • 48 MP
  • f/1.8
  • 26mm (wide)
  • 1/2.0''
  • 0.8µm
  • PDAF -8 MP
  • f/2.2
  • 13mm (ultrawide)
  • 1/4.0''
  • 1.12µm -5 MP
  • f/2.4
  • (macro)
  • 1.12µm -2 MP
  • (depth)
Functions
  • LED flash
  • HDR
  • panorama
Video
  • Yes
  • 1080p@30fps
Front camera, selfie
  • 0.3 MP
  • Single
  • 16 MP
  • Single
Specifications
  • VGA
  • 16 MP
  • f/2.5
  • (wide)
  • 1.0µm
Performance
Performance — specifications for A66, Redmi Note 9S.
SpecificationA66Redmi Note 9S
Processor CPU
  • Dual-core 1.2 GHz
  • Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver)
Graphics processor GPU Unknown
  • Adreno 618
General specs
General specs — specifications for A66, Redmi Note 9S.
SpecificationA66Redmi Note 9S
Release date
  • 2014
  • 2020
  • March 23
Colors
  • White
  • Black
  • Aurora Blue
  • Glacier white
  • Interstellar Gray
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • $ 199
Battery life
  • Stand by time- Up to 160 h Talking time- Up to 5 h
Unknown
Body build Unknown
  • Glass front (Gorilla Glass 5)
  • glass back (Gorilla Glass 5)
  • plastic frame
Communication and Connectivity
Communication and Connectivity — specifications for A66, Redmi Note 9S.
SpecificationA66Redmi Note 9S
SIM card
  • Dual SIM
  • Dual SIM (Nano-SIM
  • dual stand-by)
Network Unknown
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 -4G - LTE band 1(2100)
  • 2(1900)
  • 3(1800)
  • 4(1700/2100)
  • 5(850)
  • 7(2600)
  • 8(900)
  • 20(800)
  • 28(700)
  • 38(2600)
  • 40(2300)
Speed Unknown
  • HSPA 42.2/5.76 Mbps
  • LTE-A
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • hotspot
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • Wi-Fi Direct
  • hotspot
GPS
  • Yes
  • Yes
  • with A-GPS
  • GLONASS
  • GALILEO
  • BDS
USB
  • microUSB
  • 2.0
  • Type-C 1.0 reversible connector
Bluetooth
  • 2.0
  • 5.0
  • A2DP
  • LE
Harmful irradiation
  • SAR EU - 0.38 W/kg (head) 0.47 W/kg (body)
Unknown
Music and Audio
Music and Audio — specifications for A66, Redmi Note 9S.
SpecificationA66Redmi Note 9S
Radio
  • FM radio
  • FM radio
  • recording
Others Unknown
  • 450 nits typ. brightness (advertised)
Other features
Other features — specifications for A66, Redmi Note 9S.
SpecificationA66Redmi Note 9S
Dop
  • Sensors Accelerometer
  • proximity
  • Sensors Fingerprint (side-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass
  • Infrared port - Fast charging 18W - Splash-proof