Why is my body battery low after a good night sleep 5/100. This happens frequently lately. I wear my Garmin 245 music during the night.
Yes, it looks OK. Well, Garmin uses the algorithm from Firstbeat, so perhaps reading the following documents on Firstbeat's website can give you the answer, why the indicator remained low:
What You Need to Know About Garmin’s Body Battery
5 Reasons Your Body Battery Says You’re Running Low
PS: I like the most the 5th reason: "You are unique"
Sadly the links in the previous reply are broken
Looks like they moved it to Garmin's website now, at least the second one: