I have one. 100% dependent, dynamic rate, wireless interface, logging, runs about 7 years. "Battery low" state is addressed with progressively more annoying beh

I have one. 100% dependent, dynamic rate, wireless interface, logging, runs about 7 years. "Battery low" state is addressed with progressively more annoying behavior (fixed 60 bpm, beat skipping, etc) that both saves power and urges patient to doctor. Whole unit indeed gets replaced (yes, the hard way), no point in fiddling with maintaining old tech and increased point-of-failure interfaces. And with it, I'm likely healthier than without it & the underlying issue.