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Use this guide to replace a worn-out or dead battery in your Fitbit Ionic.
If your battery is swollen, take appropriate precautions. For your safety, discharge your battery below 25% before disassembling your Fitbit Ionic. This reduces the risk of a dangerous thermal event if the battery is accidentally damaged during the repair.
You’ll need replacement adhesive to reattach components when reassembling the device.
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Before starting, take your Fitbit Ionic off the charger and power it down.
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Heat an iOpener and apply it on the display for at least two minutes to soften the adhesive underneath.
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Insert a technician's razor with a flat blade into the small gap between the watch case and the display.
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Cut through the adhesive on the upper side of the Fitbit Ionic.
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Use a technician's razor with a flat blade to pry up the top edge of the display and create a small gap.
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Insert two opening picks underneath the top left and the top right corner.
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Leave the opening picks in place to prevent the adhesive from resealing.
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Remove the razor blade.
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Insert a third opening pick underneath the top right corner and slide it along the right edge of the display.
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Leave the opening pick in the bottom right corner to prevent the adhesive from resealing.
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Insert a fourth opening pick underneath the top left corner and slide it along the left edge of the display.
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Leave the opening pick in bottom left corner to prevent the adhesive from resealing.
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Carefully fold the display assembly in the direction of the bottom edge.
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Use the flat end of a spudger to loosen and pry up the mildly glued NFC antenna.
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Carefully fold the NFC antenna in the direction of the upper edge of the watch.
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Carefully fold the display assembly onto the upper side of the watch.
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Remove the Torx T2 screw (3.65 mm length) on the bottom left corner.
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crwdns2935267:0crwdne2935267:0Tweezers$4.99
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Use a pair of tweezers to remove the metal shield covering the battery flex cable.
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Use a spudger to pry up and disconnect the battery flex cable.
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Fold the display assembly back to its original position.
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Remove the two Torx T2 screws (3.65 mm length) from the top edge of the watch.
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Use a pair of tweezers to remove the metal cover.
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Use a spudger to pry up and disconnect the NFC antenna.
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Remove the NFC antenna.
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Use a spudger to pry up and disconnect the two display cables from the motherboard.
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Remove the Torx T2 screw (3.65 mm length).
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Use a spudger to pry up and disconnect the heart rate sensor from the motherboard.
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Insert a spudger into the gap between the watchcase and the upper edge of the motherboard.
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Use the spudger to pry up the motherboard.
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Remove the motherboard.
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Remove the four Torx T2 screws (1.8 mm length).
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Insert the flat end of a spudger between the watchcase and the battery on the top edge of your Fitbit Ionic.
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Use the spudger to pry up the battery.
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To reassemble your Fitbit ionic follow these instructions in reverse.
If possible, turn on your device and test your repair before installing new adhesive and resealing.
For optimal performance, calibrate your newly installed battery: Charge it to 100% and keep charging it for at least 2 more hours. Then use your device until it shuts off due to low battery. Finally, charge it uninterrupted to 100%.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
To reassemble your Fitbit ionic follow these instructions in reverse.
If possible, turn on your device and test your repair before installing new adhesive and resealing.
For optimal performance, calibrate your newly installed battery: Charge it to 100% and keep charging it for at least 2 more hours. Then use your device until it shuts off due to low battery. Finally, charge it uninterrupted to 100%.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
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This guide is very detailed and pretty accurate. Thank you for posting it!
Does anyone know how crucial the ‘Calibration’ procedure noted at the end article is?
I replaced my battery and it drains so quickly - during the course of a few hours.
But I didn’t try leaving it on the charger for 2 hours after 100% is reached. Trying that now.
