My Detailed Initial In-Water Impressions of Garmin Mk3i

[aedwards92]

Question: has your mk2i battery life degraded substantially over time? I have an mk2i and I only charge it to ~80% because I read on the internet that charging it all the way to 100% on a regular basis will wear out the battery prematurely. Years later my battery is like new, but of course I have no idea whether that's because I don't charge it beyond 80%, or whether it would have done just as well even if I was regularly charging it to 100%. As someone who charges to 100%, what have you observed?

When I charge my Mk2i (every couple of weeks or so) I charge it to 100% and haven’t seen any degradation after 2+ years of use

 

[supranatural]

I’ve only recently seen minor degradation of the battery, and I’ve had my Mk2i for 2-1/2 years now. I regularly charge it to 100%, maybe I should do only 80% but 100% has been good for 8 days and that brings it down to about 41-43% (and it’s used daily for sports/health monitoring). Last month the battery seemed to start dropping much faster, I use an analog watch face as I like that, and I believe the constant second hand and maybe even the watch face is a drain. I switched to a digital face and I’m back to 8 days and getting to 81-84% again. I’m probably getting a Mk3i in the summer, so maybe that one I will limit to 80% charging…