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Garmin Edge 520 shuts off after cable removed

My Garmin Edge 520 appears to have a full charge while it's plugged in and charging. Once I disconnect the cord, it immediately shuts off and will not boot up. Prior to this the battery stayed charged for a few hours during rides. It has been slowly getting worse but very much still usable.

Any ideas on how to get this working again?

Thanks.

  • The battery has failed and your options are either to use it connected to a power bank or open the case and replace the battery with a 3rd party one. You should be able to find one on the internet along with how to videos.