Charge 3 Battery Replacement
Supper Simon and 2 other contributors
Last updated on Mar 22, 2026
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Introduction
Go to step 1 ↓This repair helps fix bad battery life which could cause the device to reboot at random
What you need
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Remove both T2 screws
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Slide off the plastic piece by lifting out and then up
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Slide plastic and spring assembly off the rail
Ask FixBot
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Heat the glass screen with a blowdryer to soften the adhesives
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Insert a razor blade between the glass and the body
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Keep going around the rim of the display until loose
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Connect new battery connector
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Peel the plastic layer off the adhesive backing
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Put the battery back in place
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Flip down the screen and remove any extra glue that squeezes out
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Take a rubber band and wrap it around the device, this will ensure the display stays in place until the glue cures
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With the rubber bands on go to step 1 and reverse the steps to reinstall the band release
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When the glue is fully cured remove the rubber bands
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And voila - you now have a repaired Fitbit Charge 3
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Thanks to ShellingRook27's Original Dissasembly I Was Able to Make this Guide And Bring a new life to my old device.
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2 other people completed this guide.
4 Guide Comments
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
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
