I used to look at the info on healthydrones and panic ever so slightly. Over time, I eventually got used to the fact that it would show up battery errors, but I'm not so sure if the information is really that worthwhile. And here's why.
A few days ago, I went through two batteries in a big open field doing speed tests, load tests etc. All the time with the battery full indicator showing. The reason why I did this was on a previous flight I saw the battery voltage indicator turning yellow under the percentage figure and that had worried me.
So I loaded up a fresh battery and did a series of full load up and down tests, full up and forward tests, full forward, full sideways - all looking for some definitive data. I'm on the latest version of everything, app, firmware etc.
I noticed in many of the tests that one or even two of the cells would turn yellow under load. Removing the load immediately turned the voltage back to green. In fact, as the battery became depleted, it became easier and easier to turn all cells yellow - in fact often towards the end of the test they were all turning red indicating dangerously low voltages across all cells. This while treating the craft like a racing machine - all done on purpose. I'd never actually fly like that.
What I did discover was that it is fairly easy to keep the cells green by being gentle on the throttle and easing acceleration up at all times. I suppose it's like being in the car - full throttle ain't going to give a smooth ride!
It was interesting to analyse the healthydrones data afterwards - it only showed two minor variations and neither of these were on the cells that I could initially turn yellow or red. My test voltages indicated that cells 1&2 were the weakest, but HD indicates that cell 4 is the problematic one.
Therefore, while the HD battery information is probably something to keep an eye on over a period of time, I couldn't see the correlation between the reports and what my field experiences were.
YMMV.