Why has Garmin been so conspicuously silent on this?
Garmin contacted me (the original poster in this thread) in January of 2019 not long after the first post. They requested I send them a folder of data from my device which I promptly provided. I have heard…
Well, seems the only big issue for this great device is solved now.
I replaced the original (4x20x28) Li-ion battery to a bigger (5x25x30) Li-polimer battery.
First testdrive was today:
AVG temp: 6 C…
The issue for me seems to be the battery can't provide power when cold, rather than the battery losing all of it's charge. Today I was riding at just above freezing, The device shut down after less than 2 hours (no sensors, not connected to phone). When I got home I turned it on straight into the service menu. It was on 1% battery but this quickly increased even though it wasn't charging. After about 10-15 mins the battery was back up to 52% and the temp was 20 degrees Celsius. So the battery still had half of it's charge left when it shut down. I reckon if the device could be kept warmer the battery would last longer. My phone (in a fleece jacket pocket) was still on 92% at the end of the ride and my Vivoactive watch only lost a few percent even though I used it to track the last 10 miles of my ride. I do have a silicone skin but that doesn't seem to provide much insulation. I guess the device doesn't generate much heat and the battery just gets really cold, or the sensor that measures the charge is not working well in the cold? So I can't see that replacing the battery will make a difference, unless some batteries are better in the cold.