Originally Posted by
Rick@OCRR
I have to use an external battery back-up on my Garmin 800 for double centuries too.
Rick / OCRR
You just need to ride faster.
The last time I did a double century was probably before Garmins and smart phones were invented.
I use my Garmin Edge 705 or Forerunner 305 for tracking mileage. I upload to both Strava and Garmin Connect. I carry a smart phone but I use it for phone calls mostly with the occasional weather check.