It looks like the old battery in my trusty Garmin Edge 810 is not what it used to be.
I turned off Bluetooth and the back light, as Garmin suggests. On a 2-hour ride, it still lost 20% of its charge. At that rate, it won't make it through a long ride.
I'd rather not send it in to Garmin and be without the unit for who knows how long. Has anyone replaced a battery in a Garmin 800/810? It looks like a simple process.
I found this site that sells a 1000 mAh replacement battery and installation kit:
Batteryship.com - Garmin Edge 800 Battery Replacement
Replacement Battery for Garmin Edge 800/810