New battery test, day 550: 2.95 volts. We (green line) are in the turn, but I still expect this CR2016 coin cell to propel Sensor Watch from February 2022 to February 2024 at least. (I also caught up with my friend Ben, who started on the same day but kept his hourly chime enabled. As of day 244, his watch is riding the lower yellow curve, but it’s still solidly in the territory of “year-plus battery life.”)