Garmin Fenix 3 Battery Replacement Repair Guide

Difficulty

Easy

Steps

Time Required

                          5 minutes

Sections

Display Assembly
4 steps
GPS Antenna
2 steps
Battery
3 steps

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Introduction

What you need

Step 1

              Display Assembly

Use a T6 screwdriver to remove the five 1.7 mm screws from the watch face.

Use a T6 screwdriver to remove the five 1.7 mm screws from the watch face.

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Step 2

Carefully lift the face off the watch base.
Do not yank the face. A ribbon connector connects the face and the motherboard, and yanking could result in damage to the motherboard or ribbon.

Carefully lift the face off the watch base.

Do not yank the face. A ribbon connector connects the face and the motherboard, and yanking could result in damage to the motherboard or ribbon.

Step 3

Use a spudger to lift up and free the screen ribbon cable’s press-fit connector from the motherboard.

Use a spudger to lift up and free the screen ribbon cable’s press-fit connector from the motherboard.

Step 4

Set the watch face aside.

Set the watch face aside.

Step 5

              GPS Antenna

Locate the antenna, which is located on the motherboard.

Locate the antenna, which is located on the motherboard.

Step 6

Carefully remove the antenna, and set it aside.

Carefully remove the antenna, and set it aside.

Step 7

              Battery

Use a T5 screwdriver to remove the two silver 1.4 mm screws from the motherboard.
To avoid losing or dropping the screws once they are loose, use tweezers to extract them.

Use a T5 screwdriver to remove the two silver 1.4 mm screws from the motherboard.

To avoid losing or dropping the screws once they are loose, use tweezers to extract them.

Step 8

Lift the watch and turn it over one hand. The motherboard should fall out easily.
When reinserting your motherboard, slide it in instead of pressing it. The motherboard must go beneath a lip at the base of the watch body.

Lift the watch and turn it over one hand. The motherboard should fall out easily.

When reinserting your motherboard, slide it in instead of pressing it. The motherboard must go beneath a lip at the base of the watch body.

Step 9

Using the spludger, separate the battery from the motherboard, which are both held together with a mild adhesive. Note that the battery connector lifts upward away from the circuit board by simply lifting the wires up should pop the connector.
When re-seating the new battery connector make sure the connector is seated home fully or it will not work and the the watch will show “100%” when on the charger but will not start.

Using the spludger, separate the battery from the motherboard, which are both held together with a mild adhesive. Note that the battery connector lifts upward away from the circuit board by simply lifting the wires up should pop the connector.

When re-seating the new battery connector make sure the connector is seated home fully or it will not work and the the watch will show “100%” when on the charger but will not start.

To reassemble your device, follow these instructions in reverse order.

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                                                                                      13 other people completed this guide.

Author

                                      with 7 other contributors

                    Adam Estabrook

Member since: 09/07/2018

997 Reputation

                                      5 Guides authored                  



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Team

                       Appalachian State University, Team S1-G3, Menagarishvili Fall 2018                        

                                                  Member of Appalachian State University, Team S1-G3, Menagarishvili Fall 2018 



                    APSU-MENAGARISHVILI-F18S1G3                     


                                            3 Members                     


                                            5 Guides authored

John Smith - Apr 13, 2020

Ruined my watch… The battery connection socket ripped off with the battery connector…

I have taken apart phones and laptops in the past without issue, so I am not inexperienced by any means. I was as careful as possible.

Nick Coldham - Feb 24, 2021

Excellent guide - thanks! My Fenix3 wasn’t charging any more so following your guide I replaced the ‘dead’ battery with a new one with ease. However, when reassembled, the new battery worked but would not charge. I took it apart again, and found slight corrosion or gunk on the motherboard terminals where they contact the inner side of the charging pins. After a good clean with meths and a cotton bud I popped the original battery back in, reassembled it, and hey presto! it started charging! Very happy!

Roy J. Villarreal III - Apr 3, 2021

I appreciate the guide as my Fenix 3 after 6 years of owning it could barely make it 24 hours without charging it.

The only thing I’d add to the guide is that you can reuse the adhesive from the existing battery as it’s only double-sided tape. Other than, it went flawless!

Michael Reid - May 29, 2021

Thanks for this. Just did it successfully. A quick note, when you are separating the battery from the motherboard, it pulls up/perpendicular to the device and not parallel to it as I had initially thought. Luckily I did not break the battery connector to the motherboard. When I put it back in I needed to push it towards the motherboard to properly seat it. Look closely to make sure no part of the connector is sticking up, even a hair or it will not work.

Francisco Rodríguez - Jun 1, 2021

Worked perfectly! Thanks a lot

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Introduction#

What you need#

Team#

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Introduction

What you need

Team