I'm pretty convinced that the battery is wearing down more quickly since updating to version 16.00 software. My heaviest load on the battery is always hiking. Over the past few weeks (during the holiday period) I have hiked less frequently and for shorter distances but had to charge the battery more frequently than normal. Anyone else notice this? FWIW, my instinct will be 3 years old in the beginning of June (2022) and the battery capacity has changed very little from when it was new. I typically charge it when it first hits one bar (two if I'm going to be going on a longer hike).