Introduction

This guide will walk you through the process of replacing a dead or dying battery in a Garmin Forerunner 405.

Parts

No parts required.

  1. Unscrew the four 6.35 mm Torx T5 screws securing the backing of the watch.
    • Unscrew the four 6.35 mm Torx T5 screws securing the backing of the watch.

  2. Pull the backing off the watch.
    • Pull the backing off the watch.

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  4. Pull the battery wires out from the motherboard.
    • Pull the battery wires out from the motherboard.

  5. Replace battery module with backing of watch.
    • Replace battery module with backing of watch.

Conclusion

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

Kyle Kiwczak

Member since: 09/11/2014

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