Charge 3 Battery Replacement

Written By: Supper Simon
  • Comments: 4
Charge 3 Battery Replacement

Difficulty

Moderate

Steps

8

Time Required

30 minutes - 1 hour

Introduction

This repair helps fix bad battery life which could cause the device to reboot at random

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    • It is recommended to let the battery discharge before starting. It's a precaution to prevent the battery from lighting on fire if punctured.

    • Remove both T2 screws

    • Slide off the plastic piece by lifting out and then up

    • Slide plastic and spring assembly off the rail

    • Watch out for the spring on in the band release

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    • Heat the glass screen with a blowdryer to soften the adhesives

    • Start the next step on the opposite side of the Fitbit wording below the glass. This is due to the display cables being located there

    • Insert a razor blade between the glass and the body

    • Keep going around the rim of the display until loose

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    • This is how close those cables get to the edge underneath the Fitbit wording so be careful

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    • Lift the display then battery up gently

    • The battery is attached with a little bit of adhesive so lift it gently

    • Remove battery connector

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    • Connect new battery connector

    • Peel the plastic layer off the adhesive backing

    • Put the battery back in place

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    • Add a thin layer of E-6000 glue around the casing

    • Make sure to cover the entire surface that makes contact with the screen to keep the device waterproof

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    • Flip down the screen and remove any extra glue that squeezes out

    • Take a rubber band and wrap it around the device, this will ensure the display stays in place until the glue cures

    • With the rubber bands on go to step 1 and reverse the steps to reinstall the band release

    • The glue will take between 24 and 72 hours to fully cure

    • When the glue is fully cured remove the rubber bands

    • After all is done you will need to calibrate the battery to do this charge it to 100% then leave it charging for an extra 2 hours use the device until it dies of low power and finally charge it to 100% and it should be good to go

    • And walla you now have a repaired Fitbit Charge 3

Conclusion

Thanks to ShellingRook27's Original Dissasembly I Was Able to Make this Guide And Bring a new life to my old device.

Author

Supper Simon

Member since: 19/03/23

464 Reputation

4 comments

Fantastic - thanks for sharing!

K80 -

No problem anything to make the world a more fixable place

Supper Simon -

Hi! My fitbit charge 4 is taken apart now but now that I've lifted the battery what I see is completely different from what's shown in the photo. If I haven't already destroyed my Fitbit, how about a version for the Fitbit 4? Or a video would be even better. In the meantime, I'm stuck. I bought the battery from you.

Regi

Regina Merwin -

I don't have a charge 4 so I'm only going off the internet here, but you can follow some of the steps here to replace the battery https://www.youtube.com/watch?v=2C1DiVXj... and if you need any further guidance please let me know

Supper Simon -