AD600 Battery Question - Proii vs BMii

Long story short, I'm going to pick up 2x AD600 models and am on the fence between the proii or the BMii. However, this is not a question about flash duration or recycle time.

What I am curious about is while it appears the two models use different batteries, are the battery issues that godox seems to have exist in BOTH these battery models or does the BM no suffer from the charger and battery struggles.

Let me know!