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Day 27: The Emergency Phone Charging Trick

You almost never have to charge your Garmin — but what if you forget and have a long run tomorrow morning?

The trick

Many modern Garmins charge via USB-C. Your phone also charges via USB-C. And most modern phones support reverse wireless charging or can act as a USB power bank via a USB-C to USB-C cable.

• If your phone has reverse wireless charging: place your Garmin charger on the back of your phone (only works with wireless Garmin chargers)
• If you have a USB-C to USB-C cable: plug your Garmin's charging cradle into your phone's USB-C port and charge directly

This only works on newer devices

Older Garmins use proprietary charging clips that require a proper USB-A or USB-C power source. But Garmin has been moving to USB-C charging across the lineup — check your model.

How fast does it charge?

Not fast. Your phone delivers far less current via reverse charging than a wall adapter. But in 20–30 minutes you can typically get 15–20% battery — enough for a long run the next morning.