I do hope you’re wrong, as I’ve had nothing but the best service from Sofirn every time I needed them, and @Barry0892 specially has been great in his outreach and interactions here in BLF.
That’s not a fault against sofirn, most of them won’t usually give you details on batteries.
I was able to get complete data on my BL1634U battery from CyanSky, which is a much smaller vendor with significantly less BLF exposure, that’s why I expect Sofirn to respond to my questions about their battery. But we shall all see, I guess.