alcatel OT-997D vs Energizer Energy E520 LTE

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

    OT-997D: 63 g lighter

    OT-997D:
    143 g
    Energy E520 LTE:
    206 g
  • Width

    OT-997D: 8.2 mm narrower

    OT-997D:
    68 mm
    Energy E520 LTE:
    76.2 mm
  • Screen diagonal

    OT-997D: 0.9 in smaller diagonal

    OT-997D:
    4.3 in
    Energy E520 LTE:
    5.2 in
  • Chipset

    OT-997D:
    Mediatek MT6577 (40 nm)
    Energy E520 LTE:
    Mediatek MT6737 (28 nm)
  • Height

    OT-997D: 21 mm shorter

    OT-997D:
    129.8 mm
    Energy E520 LTE:
    150.8 mm
  • Release year

    OT-997D:
    2012
    Energy E520 LTE:
    2017

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. OT-997D

    Height:
    129.8 mm
    Width:
    68 mm
    Depth:
    11 mm
  2. 2. Energy E520 LTE

    Height:
    150.8 mm +21 mm versus OT-997D
    Width:
    76.2 mm +8.2 mm versus OT-997D
    Depth:
    11.1 mm

Weight

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

  1. 1. OT-997D

    143 g

  2. 2. Energy E520 LTE

    206 g

    +63 g versus OT-997D

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. OT-997D

    Screen diagonal:
    4.3 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    52.6 cm²
  2. 2. Energy E520 LTE

    Screen diagonal:
    5.2 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    74.5 cm²

Energy E520 LTE has approximately 41.6% more rectangular screen area than OT-997D.

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 OT-997D, Energy E520 LTE, compared at the same storage capacity.
StorageOT-997DEnergy E520 LTE
4 GB 1 GB RAM Not recorded
16 GB Not recorded 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. OT-997D

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

2. Energy E520 LTE

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB (uses SIM 2 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. OT-997D

    1800 mAh

  2. 2. Energy E520 LTE

    4000 mAh

    +2200 mAh versus OT-997D

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. OT-997D2. Energy E520 LTE

Everyday essentials
Everyday essentials — specifications for OT-997D, Energy E520 LTE.
SpecificationOT-997DEnergy E520 LTE
Dimensions (HxWxD)
  • 129.8 Х 68 Х 11 mm
  • 150.8 Х 76.2 Х 11.1 mm
Weight
  • 143 g
  • 206 g
Technology
  • TFT
  • LTPS IPS LCD
Screen size
  • 4.3" inch
  • 5.2" inch
Screen resolution
  • 480 x 800 px
  • 720 x 1280 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 4 GB
  • 1 GB RAM
  • 16 GB
  • 2 GB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • microSD
  • up to 32 GB (uses SIM 2 slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1800 mAh
  • Removable Li-Ion
  • 4000 mAh
  • Non-removable Li-Ion
Operating system OS
  • Android 4.0 (Ice Cream Sandwich)
  • Android 6.0 (Marshmallow)
Chipset
  • Mediatek MT6577 (40 nm)
  • Mediatek MT6737 (28 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for OT-997D, Energy E520 LTE.
SpecificationOT-997DEnergy E520 LTE
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 52.6 cm2
  • 74.5 cm2
Screen format
  • 5:3 (height:width)
  • 16:9 (height:width)
Screen to body ratio
  • 59.6%
  • 64.9%
PPI /points per inch/
  • 217 PPI
  • 282 PPI
Screen protection Unknown
  • Corning Gorilla Glass 3
Camera and Video
Camera and Video — specifications for OT-997D, Energy E520 LTE.
SpecificationOT-997DEnergy E520 LTE
Rear camera, main
  • 8 MP
  • Single
  • 13 MP
  • Single
Camera specs
  • 8 MP
  • AF
  • 13 MP
  • AF
Functions
  • LED flash
  • LED flash
  • HDR
  • panorama
Video
  • 720p@30fps
  • 1080p@30fps
Front camera, selfie
  • 0.3 MP
  • Single
  • 5 MP
  • Single
Specifications
  • VGA
  • 5 MP
Performance

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

Performance — specifications for OT-997D, Energy E520 LTE.
SpecificationOT-997DEnergy E520 LTE
Processor CPU
  • Dual-core 1.0 GHz Cortex-A9
  • Quad-core 1.3 GHz Cortex-A53
Graphics processor GPU
  • PowerVR SGX531u
  • Mali-T720
Antutu 7 score *
  • 9320
  • 29852
GeekBench 4 Single Core * Unknown
  • 528
GeekBench 4 Multi-Core * Unknown
  • 1486
General specs
General specs — specifications for OT-997D, Energy E520 LTE.
SpecificationOT-997DEnergy E520 LTE
Release date
  • 2012
  • July
  • 2017
  • September
Colors
  • Black
  • White
  • Black
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 280 EUR
  • 330 EUR
Battery life
  • Stand by time- Up to 400 h (2G) / Up to 350 h (3G) Talking time- Up to 16 h (2G) / Up to 8 h 30 min (3G)
  • Stand by time- Up to 220 h (3G) Talking time- Up to 15 h (3G)
Communication and Connectivity
Communication and Connectivity — specifications for OT-997D, Energy E520 LTE.
SpecificationOT-997DEnergy E520 LTE
SIM card
  • Dual SIM (Mini-SIM
  • dual stand-by)
  • Hybrid Dual SIM (Nano-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 7(2600)
  • 8(900)
  • 20(800)
Speed
  • HSPA 7.2/5.76 Mbps
  • HSPA 42.2/11.5 Mbps
  • LTE Cat4 150/50 Mbps
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • hotspot
  • Wi-Fi 802.11 b/g/n
  • hotspot
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
  • GLONASS
USB
  • microUSB 2.0
  • microUSB 2.0
Bluetooth
  • 4.0
  • A2DP
  • 4.0
  • A2DP
  • LE
Harmful irradiation
  • SAR - 0.50 W/kg (head) 0.74 W/kg (body)
  • SAR - 0.26 W/kg (head) 0.60 W/kg (body)
Music and Audio
Music and Audio — specifications for OT-997D, Energy E520 LTE.
SpecificationOT-997DEnergy E520 LTE
Radio
  • Stereo FM radio
  • RDS
  • FM radio
Others
  • SRS audio
Unknown
Other features
Other features — specifications for OT-997D, Energy E520 LTE.
SpecificationOT-997DEnergy E520 LTE
Dop
  • Sensors Accelerometer
  • proximity
  • compass
  • Sensors Fingerprint (rear-mounted)
  • accelerometer
  • proximity
  • compass - IP68 dust/water proof (up to 1.5m for 30 mins) -MIL-STD-810G compliant