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.

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

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  • Pull the backing off the watch.

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  • Pull the battery wires out from the motherboard.

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  • Replace battery module with backing of watch.

It says "No Parts Required" in the parts list, but then says to "Replace battery module with backing of watch." Obviously a part is needed, but where can one get this from?

Dan Jansen - Reply

Conclusion

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

Kyle Kiwczak

Member since: 09/11/2014

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