Not really the question I was answering, but that's not actually a health connect problem.
Withings had an issue, and the way they were connecting to it, which caused a battery drain.
To be specific, withings health mate was constantly reading health connect data, which caused a massive power drain.
I'm not aware of any other battery issues with health connect other than Withings and their Health Mate app (specifically reading, not writing).
(Edit: why, why would autocorrect change writing to riding? For shame. To me, for not noticing sooner.)