Celkon Millennia Hero vs Lava Z61

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

    Millennia Hero: 26 g lighter

    Millennia Hero:
    113 g
    Z61:
    139 g
  • Width

    Millennia Hero: 6.2 mm narrower

    Millennia Hero:
    64 mm
    Z61:
    70.2 mm
  • Screen diagonal

    Millennia Hero: 1.45 in smaller diagonal

    Millennia Hero:
    4 in
    Z61:
    5.45 in
  • Depth

    Z61: 2.3 mm thinner

    Millennia Hero:
    11 mm
    Z61:
    8.7 mm
  • Height

    Millennia Hero: 21.5 mm shorter

    Millennia Hero:
    125 mm
    Z61:
    146.5 mm
  • Release year

    Millennia Hero:
    2015
    Z61:
    2018

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. Millennia Hero

    Height:
    125 mm
    Width:
    64 mm
    Depth:
    11 mm +2.3 mm versus Z61
  2. 2. Z61

    Height:
    146.5 mm +21.5 mm versus Millennia Hero
    Width:
    70.2 mm +6.2 mm versus Millennia Hero
    Depth:
    8.7 mm

Weight

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

  1. 1. Millennia Hero

    113 g

  2. 2. Z61

    139 g

    +26 g versus Millennia Hero

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. Millennia Hero

    Screen diagonal:
    4 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    45.5 cm²
  2. 2. Z61

    Screen diagonal:
    5.45 in
    Aspect ratio (height:width):
    18:9
    Approximate rectangular screen area:
    76.7 cm²

Z61 has approximately 68.3% more rectangular screen area than Millennia Hero.

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 Millennia Hero, Z61, compared at the same storage capacity.
StorageMillennia HeroZ61
8 GB 1 GB RAM Unknown
Z61: Original memory entry

16 GB · 1/2 GB 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. Millennia Hero

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

2. Z61

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

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. Millennia Hero

    1700 mAh

  2. 2. Z61

    3000 mAh

    +1300 mAh versus Millennia Hero

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. Millennia Hero2. Z61

Everyday essentials
Everyday essentials — specifications for Millennia Hero, Z61.
SpecificationMillennia HeroZ61
Dimensions (HxWxD)
  • 125 Х 64 Х 11 mm
  • 146.5 Х 70.2 Х 8.7 mm
Weight
  • 113 g
  • 139 g
Technology Unknown
  • IPS LCD
Screen size
  • 4" inch
  • 5.45" inch
Screen resolution
  • 480 x 800 px
  • 720 x 1440 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 8 GB
  • 1 GB RAM
  • 16 GB
  • 1/2 GB RAM
Memory card support
  • microSD
  • up to 32 GB
  • microSD
  • up to 32 GB
Battery Capacity is not battery life. No endurance test is implied.
  • 1700 mAh
  • Li-Ion
  • 3000 mAh
  • Removable Li-Po
Operating system OS
  • Android 5.1 (Lollipop)
  • Android 8.0 Oreo (Go edition) - 1 GB RAM modelAndroid 8.1 (Oreo) - 2 GB RAM model
Chipset Unknown
  • Mediatek MT6739WW (28 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Millennia Hero, Z61.
SpecificationMillennia HeroZ61
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors Unknown
  • 16M
Screen area
  • 45.5 cm2
  • 76.7 cm2
Screen format
  • 5:3 (height:width)
  • 18:9 (height:width)
Screen to body ratio
  • 56.9%
  • 74.5%
PPI /points per inch/
  • 233 PPI
  • 295 PPI
Screen protection Unknown
  • Corning Gorilla Glass (unspecified version)
Camera and Video
Camera and Video — specifications for Millennia Hero, Z61.
SpecificationMillennia HeroZ61
Rear camera, main
  • 5 MP
  • Single
  • 8 MP
  • Single
Camera specs
  • 5 MP
  • 8 MP
  • f/2.0
  • 1.12µm
  • AF
Functions
  • LED flash
  • LED flash
Video
  • Yes
  • 1080p@30fps
Front camera, selfie
  • 3.2 MP
  • Single
  • 5 MP
  • Single
Specifications
  • 3.2 MP
  • 5 MP
  • f/2.4
Performance

Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.

Performance — specifications for Millennia Hero, Z61.
SpecificationMillennia HeroZ61
Processor CPU
  • Quad-core 1.2 GHz
  • Quad-core 1.5 GHz Cortex-A53
Graphics processor GPU Unknown
  • PowerVR GE8100
Antutu 7 score * Unknown
  • 35202
General specs
General specs — specifications for Millennia Hero, Z61.
SpecificationMillennia HeroZ61
Release date
  • 2015
  • August
  • 2018
  • July
Colors
  • Black
  • White/Gold
  • White/Silver
  • Black/Gold
  • Gold
  • Black
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 5700 INR
Communication and Connectivity
Communication and Connectivity — specifications for Millennia Hero, Z61.
SpecificationMillennia HeroZ61
SIM card
  • Dual SIM
  • Dual SIM (Micro-SIM/Nano-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 900 / 1800 - SIM 1 & SIM 2
  • Show all network frequencies: -2G - GSM 900 / 1800 - SIM 1 & SIM 2 -3G - HSDPA 900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 5(850)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA
  • HSPA
  • LTE Cat4 150/50 Mbps
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • Wi-Fi Direct
  • hotspot
GPS
  • A-GPS
  • Yes
  • with A-GPS
USB
  • microUSB 2.0
  • microUSB 2.0
Bluetooth
  • 2.0
  • 4.0
  • A2DP
Harmful irradiation
  • SAR EU - 0.34 W/kg (head) 0.76 W/kg (body)
Unknown
Music and Audio
Music and Audio — specifications for Millennia Hero, Z61.
SpecificationMillennia HeroZ61
Radio
  • FM radio
  • FM radio
Other features
Other features — specifications for Millennia Hero, Z61.
SpecificationMillennia HeroZ61
Dop
  • Sensors Accelerometer
  • Sensors Accelerometer
  • proximity - For India