I have 2 of this exact model and intend to buy 3 more. Still waiting for sales though, as they are extremely expensive, but by far the best out there. And the battery lasts 1-2 years I believe, never had to replace so far and I'm probably one year in at this point. But rn it's 170 USD, which is ridiculous. I think first time I noticed these was at around 110 (which is probably already ridiculous as well?).