picturesofdogs wrote:
No, there is battery drain in the battery itself even if not in the camera. There is also a data settings battery in the camera that charges off the main battery. The camera will go into shutdown mode if left sitting and powered on but all that does is kill the display, so if you want make sure it's off use the switch.
Yes, there is a self discharge - per wikipedia for Li batteries, it is about 8% per month at 21 degrees C, 15% at 40 C, and 31% at 60 C. This is to be expected for a electrochemical system. My tests were for the a6000 being turned off, but the airplane mode was off. Camera settings are probably saved in flash memory which would not need refreshing. The only other thing would be the camera clock. Per a camera store rep the internal battery once charged should maintain all settings for about a year. The battery drains were far greater than expected and the issue was why.