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  2. BLU J4 vs Panasonic P81

BLU J4 vs Panasonic P81

Compare recorded specifications, size and practical differences.

BLU J4

BLU J4

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    Panasonic P81

    Panasonic P81

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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.

        • Release year2019 / 2014J4: 2019 · P81: 2014

        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.

        Front
        J4: 151 × 72.3 mm 1
        Side
        J4: 151 × 10 mm 1
        1. 1. J4
          Height
          151 mm
          Width
          72.3 mm
          Depth
          10 mm
          Weight
          158 g
        2. 2. P81
          Height
          Unknown
          Width
          Unknown
          Depth
          Unknown
          Weight
          Unknown

          Unavailable dimensions are omitted from the drawing.

        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.

        Screen size
        J4: 5.5 in, 18:9, About 78.1 cm² rectangular area 1 P81: 5.5 in, 16:9, About 83.4 cm² rectangular area 2
        1. 1. J4 5.5 in · 18:9 About 78.1 cm² rectangular area
        2. 2. P81 5.5 in · 16:9 About 83.4 cm² rectangular area

        P81 has approximately 6.8% more rectangular screen area than J4.

        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 by storage capacity and phone
        StorageJ4P81
        8 GB Not recorded 1 GB RAM
        32 GB 1 GB RAM Not recorded

        Practical features

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

        1. J4

        NFC
        Unknown
        Headphone jack
        Yes
        Memory card support
        See details microSDXC

        2. P81

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

        Battery capacity

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

        Recorded capacity

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

        1. 1. J42200 mAh
        2. 2. P812500 mAh

          +300 mAh versus J4

        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. J42. P81

        Everyday essentials
        Everyday essentials
        SpecificationJ4P81
        Dimensions (HxWxD)
        • 151 Х 72.3 Х 10 mm
        • Х Х mm
        Weight
        • 158 g
        • 0 g
        Technology
        • IPS LCD
        • IPS LCD
        Screen size
        • 5.5" inch
        • 5.5" inch
        Screen resolution
        • 720 x 1440 px
        • 720 x 1280 px
        Internal memoryRecorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
        • 32GB 1GB RAM
        • 8 GB
        • 1 GB RAM
        Memory card support
        • microSDXC
        • microSD
        • up to 32 GB (dedicated slot)
        BatteryCapacity is not battery life. No endurance test is implied.
        • 2200 mAh
        • Removable Li-Po
        • 2500 mAh
        • Non-removable Li-Ion
        Operating system OS
        • Android 8.1 Oreo (Go edition)
        • Android 4.2.2 (Jelly Bean)
        Chipset Unknown
        • Mediatek MT6592 (28 nm)
        Headphone jack
        • Yes
        • Yes
        Display
        Display
        SpecificationJ4P81
        Touchscreen
        • capacitive touchscreen
        • capacitive touchscreen
        Display colors
        • 16M
        • 16M
        Screen area
        • 78.1 cm2
        • 83.4 cm2
        Screen format
        • 18:9 (height:width)
        • 16:9 (height:width)
        Screen to body ratio
        • 71.5%
        		 Unknown
        PPI /points per inch/
        • 293 PPI
        • 267 PPI
        Camera and Video
        Camera and Video
        SpecificationJ4P81
        Rear camera, main
        • 8 MP
        • Single
        • 13 MP
        • Single
        Camera specs
        • 8 MP
        • AF
        • 13 MP
        • AF
        Functions
        • LED flash
        • LED flash
        Video
        • 720p@30fps
        • 1080p@30fps
        Front camera, selfie
        • 8 MP
        • Single
        • 2 MP
        • Single
        Specifications
        • 8 MP
        • 2 MP
        Performance
        Performance
        SpecificationJ4P81
        Processor CPU
        • Quad-core 1.3 GHz Cortex-A7
        • Octa-core 1.7 GHz Cortex-A7
        Graphics processor GPU
        • Mali-400
        • Mali-450MP4
        General specs
        General specs
        SpecificationJ4P81
        Release date
        • 2019
        • October
        • 2014
        • June
        Colors
        • Blue
        • Black
        • Brown
        • Black
        Historical recorded priceLegacy catalogue value; date unknown. Not a current offer.
        • 70 EUR
        • 220 EUR
        Communication and Connectivity
        Communication and Connectivity
        SpecificationJ4P81
        SIM card
        • Dual SIM (Nano-SIM
        • dual stand-by)
        • Dual SIM (Micro-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 900 / 1800 / 1900 - SIM 1 & SIM 2
        Speed
        • HSPA 21.1/5.76 Mbps
        • HSPA 21.1/5.76 Mbps
        GPRS
        • Yes
        • Yes
        Edge
        • Yes
        • Yes
        Wi-Fi
        • Wi-Fi 802.11 b/g/n
        • Wi-Fi Direct
        • hotspot
        • Wi-Fi 802.11 b/g/n
        • Wi-Fi Direct
        • hotspot
        GPS
        • Yes
        • with A-GPS
        • Yes
        • with A-GPS
        USB
        • microUSB 2.0
        • microUSB 2.0
        Bluetooth
        • 4.1
        • A2DP
        • LE
        • 3.0
        • A2DP
        Music and Audio
        Music and Audio
        SpecificationJ4P81
        Radio
        • FM radio
        • FM radio
        • RDS
        Other features
        Other features
        SpecificationJ4P81
        Dop
        • Sensors Accelerometer For USA
        • Sensors Accelerometer
        • proximity