I found this today. I am completely unaffiliated with video poster.
Cliff notes:
- guy buys P320 RX
- shoots it the next day and again in a steel match later in the week
- stores the gun thereafter
- two weeks exactly after purchase, dead battery upon removal from storage
- less than forthcoming Sig CS rep repeatedly avoids disclosing battery life
- CS rep eventually says 300-400 hours is in the ballpark
- CS rep also suggested turning it off during non carry time to save battery
- apparently the auto on-off hardware uses battery
- turning it off means no auto on feature
https://youtu.be/vQqkliReF3Y