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Dieser Teardown ist keine Reparaturanleitung. Um dein Fitbit Flex zu reparieren, verwende unsere Fehlerbehebungsseite.

  1. Fitbit Flex Teardown, Fitbit Flex Teardown: Schritt 1, Bild 1 von 3 Fitbit Flex Teardown, Fitbit Flex Teardown: Schritt 1, Bild 2 von 3 Fitbit Flex Teardown, Fitbit Flex Teardown: Schritt 1, Bild 3 von 3
    • So many goodies in one package! The Fitbit Flex comes with the following:

    • Two adjustable wristbands: one large, one small

    • Wireless sync dongle

    • Charging cable

    • The Flex tracker sports some cool tech specs, too.

    • Bluetooth 4.0 syncing

    • Memory to store 30 days of data

    • 5-day battery life

  2. Fitbit Flex Teardown: Schritt 2, Bild 1 von 3 Fitbit Flex Teardown: Schritt 2, Bild 2 von 3 Fitbit Flex Teardown: Schritt 2, Bild 3 von 3
    • With less effort than peeling an orange, we peel the Fitbit Flex tracker out of the flexible wrist strap.

    • Although it seems like a small consideration, we appreciate how easy it is to separate the electronics from the wrist strap—the component most likely to wear out.

  3. Fitbit Flex Teardown: Schritt 3, Bild 1 von 2 Fitbit Flex Teardown: Schritt 3, Bild 2 von 2
    • Normally we would compare the device to other similar devices. Unfortunately, we don't really have much to compare the Flex to. How about a half dollar?

    • The Flex may be slightly larger than a half dollar (though smaller than half a dollar bill), but it will cost you 200 of them.

    • If anyone pays for a Fitbit Flex with half dollars, we would love to hear about it.

    • The back of the Flex reveals the model number, FB401, and provides a nice insertion arrow. It's not quite disassembly information, but it's something, right?

  4. Fitbit Flex Teardown: Schritt 4, Bild 1 von 3 Fitbit Flex Teardown: Schritt 4, Bild 2 von 3 Fitbit Flex Teardown: Schritt 4, Bild 3 von 3
    • The first things we notice on the Flex are the waterproof contacts. This is good news for those who might be sweating while wearing, or tearing down, the Flex.

    • For the record, the Flex claims to be water-tight up to 10 meters, or 264 simultaneous Gatorade showers.

    • This tiny gizmo fits snugly in its USB charger when its lithium-polymer battery needs juice.

    • Not to worry, it won't take the place of your smartphone on the charger each night—this little gadget has a reported battery life of 5 days.

  5. Fitbit Flex Teardown: Schritt 5, Bild 1 von 2 Fitbit Flex Teardown: Schritt 5, Bild 2 von 2
    • With no visible point of entry, we figure the path to victory can be carved with judicious application of sharp tools.

    • Around here, we're big fans of Dozuki. We're also big fans of dozukis. When saw comes to gadget, you know it's a teardown.

    • Remember that teardowns are for fun and should not be followed as disassembly instructions. Please do not cut into your device with a dozuki.

  6. Fitbit Flex Teardown: Schritt 6, Bild 1 von 3 Fitbit Flex Teardown: Schritt 6, Bild 2 von 3 Fitbit Flex Teardown: Schritt 6, Bild 3 von 3
    • Our first extraction: the light guides for the LEDs that pass for a display on this slim, dare we say emaciated, unit.

    • Next out is the Bluetooth antenna, used for communicating with devices and the accompanying dongle.

    • Oops! We appear to have a tiny hitchhiker; that's a piece of the motherboard hanging on to the antenna.

    • To those of you following along at home: you don't need to chop up your PCB.

    • P.S. Don't follow along at home.

    • Pulling components out through the top of the Flex worked for a little while, but it's time to get to the good stuff.

    • Using our handy rotary tool, we cut through the plastic casing of the Flex tracker.

    • Well hello there, Rico Suave! Peeling back the Flex's stylish plastic jacket reveals the components we've been looking for.

    • Repairability update: This little guy is never, ever, ever going back together.

  7. Fitbit Flex Teardown: Schritt 8, Bild 1 von 3 Fitbit Flex Teardown: Schritt 8, Bild 2 von 3 Fitbit Flex Teardown: Schritt 8, Bild 3 von 3
    • The main board slides right away from the contact pins. Now we can get to the juicy bits.

    • Small and encased in a thin sheet of metal tape, the battery is soldered to the motherboard. By this point, a replaceable battery is the least of our worries.

    • We're getting some good vibrations from the prominent vibrator that functions as an alarm.

    • This is how your vibrator works in your Fitbit Flex.

  8. Fitbit Flex Teardown: Schritt 10, Bild 1 von 3 Fitbit Flex Teardown: Schritt 10, Bild 2 von 3 Fitbit Flex Teardown: Schritt 10, Bild 3 von 3
    • Stuck right on to the front of the board we find a near field communications (NFC) antenna.

    • The NFC tag enables a tap launch of the Flex tracker's associated mobile app with "select NFC-enabled Android devices."

    • "It's like magic."

    • This little guy looks like a likely candidate for the NFC controller.

  9. Fitbit Flex Teardown: Schritt 11, Bild 1 von 2 Fitbit Flex Teardown: Schritt 11, Bild 2 von 2
    • The motherboard flexes to show us what it's repping:

    • STMicroelectronics 32L151C6 Ultra Low Power ARM Cortex M3 Microcontroller

    • Nordic Semiconductor nRF8001 Bluetooth Low Energy Connectivity IC

    • STMicroelectronics LIS2DH 3-Axis Accelerometer

    • Charger IC: TI BQ24040

  10. Fitbit Flex Teardown: Schritt 12, Bild 1 von 3 Fitbit Flex Teardown: Schritt 12, Bild 2 von 3 Fitbit Flex Teardown: Schritt 12, Bild 3 von 3
    • We just couldn't keep our scalpels to ourselves, so we ripped into the Flex's dongle as well.

    • Plastic aside, we get to the goodies.

    • We quickly free the dongle board from the metal casing of the USB plug.

  11. Fitbit Flex Teardown: Schritt 13, Bild 1 von 2 Fitbit Flex Teardown: Schritt 13, Bild 2 von 2
    • Enough loligagging, let's cut to the chase. This diminutive USB board houses all of the hardware needed to communicate with the Flex — and your computer:

    • Texas Instruments CC2540F128 2.4 GHz Bluetooth Low Energy SoC

    • On the contact side:

    • BLE Antenna

    • USB connection contacts

  12. Fitbit Flex Teardown: Schritt 14, Bild 1 von 2 Fitbit Flex Teardown: Schritt 14, Bild 2 von 2
    • Fitbit Flex Repairability Score: 2 out of 10 (10 is easiest to repair)

    • Solid waterproofing, no moving parts, and lightweight construction make the Flex a very durable device, with the potential to last a long time.

    • The wrist strap is similarly constructed and can be easily replaced.

    • It's impossible to open the device without destroying it or at least compromising the waterproofing, making internal repairs infeasible.

    • The Flex's inaccessible (and non-replaceable) battery limits the life of the device.

24 Kommentare

唔,里边似乎不太精致呀。

Jam - Antwort

i also lost the cable charger, anybody know the 3 pin (positive negative) for fitbit. Any universal charger I can use?

Victor Hugo Garcia Hernandez - Antwort

look at the enlarged image... Left Pin is connected to the housing of the vibrator - this tells me its GND or Neg, center pin has a much thinner track on the PCB i would call it Data, right pin therefore looks like VCC+.

Sarah -

i also lost the cable charger, anybody know the 3 pin (positive negative) for fitbit. Any universal charger I can use and how?

Victor Hugo Garcia Hernandez - Antwort

Have you found out? Wish ifixit tore down the motherboard.

Peter -

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