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Garmin Fenix 3 HR Battery Replacement

Introduction

This guide will give you step-by-step instructions on how to quickly swap out that old battery for a new one.

What you need

  1. Garmin Fenix 3 HR Battery Replacement, Battery: step 1, image 1 of 2 Garmin Fenix 3 HR Battery Replacement, Battery: step 1, image 2 of 2

    • Remove the five 7mm screws with H1.3 hex screwdriver.

    Edit

  2. Garmin Fenix 3 HR Battery Replacement: step 2, image 1 of 3 Garmin Fenix 3 HR Battery Replacement: step 2, image 2 of 3 Garmin Fenix 3 HR Battery Replacement: step 2, image 3 of 3

    • Use a plastic opening tool to remove the face of the device to expose the inner components.

    • There is one metal piece at the top of the face that is loose. This is the GPS antenna which will need to be removed as well.

    • Be careful with the ribbon that connects the motherboard to the display.

    Edit

  3. Garmin Fenix 3 HR Battery Replacement: step 3, image 1 of 1

    • Proceed to disconnect the ribbon from the motherboard using tweezers.

    Edit

  5. Garmin Fenix 3 HR Battery Replacement: step 4, image 1 of 2 Garmin Fenix 3 HR Battery Replacement: step 4, image 2 of 2

    • Using a T5 screwdriver, remove the two 5mm screws.

    • The motherboard should now move freely.

    Edit

  6. Garmin Fenix 3 HR Battery Replacement: step 5, image 1 of 1

    • Another ribbon is attached to the top of the motherboard. Disconnect this ribbon.

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  7. Garmin Fenix 3 HR Battery Replacement: step 6, image 1 of 1

    • Disconnect wires connecting battery to motherboard.

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  8. Garmin Fenix 3 HR Battery Replacement: step 7, image 1 of 1

    • The battery is glued to the motherboard and will need pried off using the nylon spudger.

    Edit

  9. Garmin Fenix 3 HR Battery Replacement: step 8, image 1 of 1

    • Now attach the new battery with adhesive and reassemble.

    Edit
Conclusion

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

40 other people completed this guide.

Author

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Victor Tanguy

Member since: 03/26/18

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Team

IUPUI, Team S1-G6, Harley Spring 2018 Member of IUPUI, Team S1-G6, Harley Spring 2018

IUPUI-HARLEY-S18S1G6

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29 Comments

Does anybody do It in a fenix 5?

Fernando Alcaraz - Reply

Same question. Fenix five /+ guide on the way?

Erik E123 -

Thank you. It saved me around over £100 to change the battery myself. Garmin quoted around £121 for battery replacement for out of warranty watch. I bought the battery around £15 and followed the guide to change the battery myself in my Fenix 3 watch. My watch does not have heart rate monitor, perhaps the ribon at step 5 is for HR monitor as I didn’t have it in my watch. Thanks again for simple, detailed and easy to follow instructions.

Asif Shafiq - Reply

Where did you get the battery?

Alex -

Amazon or other 3 Party Sellerie use google for search the are tonns of Shops wich sell it

Andreas Kahl -

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