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Charge 3 Battery Replacement

Introduction

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

What you need

  1. Charge 3 Battery Replacement, Battery: step 1, image 1 of 3 Charge 3 Battery Replacement, Battery: step 1, image 2 of 3 Charge 3 Battery Replacement, Battery: step 1, image 3 of 3

    • 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

    Edit

  2. Charge 3 Battery Replacement: step 2, image 1 of 3 Charge 3 Battery Replacement: step 2, image 2 of 3 Charge 3 Battery Replacement: step 2, image 3 of 3

    • 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

    Edit

  3. Charge 3 Battery Replacement: step 3, image 1 of 1

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

    Edit

  5. Charge 3 Battery Replacement: step 4, image 1 of 3 Charge 3 Battery Replacement: step 4, image 2 of 3 Charge 3 Battery Replacement: step 4, image 3 of 3

    • 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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  6. Charge 3 Battery Replacement: step 5, image 1 of 2 Charge 3 Battery Replacement: step 5, image 2 of 2

    • Connect new battery connector

    • Peel the plastic layer off the adhesive backing

    • Put the battery back in place

    Edit

  7. Charge 3 Battery Replacement: step 6, image 1 of 1

    • 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

    Edit

  8. Charge 3 Battery Replacement: step 7, image 1 of 2 Charge 3 Battery Replacement: step 7, image 2 of 2

    • 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

    Edit

    • 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

    Edit
Conclusion

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

Author

with 1 other contributor

Supper Simon

Member since: 03/18/23

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