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  • I made it work with an Ant+ dongle and and OTG cable on a Moto G (Garmin Uploader, rather than Trainerroad, but same principle) - bit of a ballache to remember where I put them, but easier than a Windows computer just for Garmin nonsense.

  • I haz OTG and I haz dongle. Is there a way to provide nonstop battery power to phone while training through OTG. should be right?

  • Something like this, where 'OTG device' actually plugs into your phone. With possible slight variations if your phone/external battery aren't USB Micro B, or your dongle is not USB A.

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