Originally posted by tatizoo Are you sure that the root problem is related to LV mode and turning camera on?
My case was different. My setup was AV mode, Still Image, OVF and auto power off set to 1 minute. I made some shots and put camera into bag. Camera was ON but LCD monitor just turned off so I was pretty sure that after 1 minute camera should turn off automatically. I decided to return home carrying the bag. After 2 or 3 hours I opened the bag. The camera was hot and there was a warning displayed "Battery depleted". I was surprised because I fully charged battery before the trip. I investigated this case and my conclusion is to always turn main switch to "Power Off" position when inserting camera to a bag.
When camera is on and no operations are made the LCD monitor turns off after 10 seconds but all buttons, e-dials, joystick and eye-sensor are still active until Auto Power Off time is reached (let say 1 minute). The eye-sensor detects ANY OBJECTS close to it and turns camera on when detected. Not only an eye, a skin, a nose but also any piece of plastic or fabric. So, LCD monitor turned off, I put the camera to the bag before auto power off. When i closed the bag the eye-sensor detected the fabric and turned camera on, to OVF mode. When I was walking the camera was moving in the bag and probably constantly switching between OVF and LCD monitor. As far as I remember the LCD brightness in Outdoor View Setting was maximum, so power consumption was rather high and battery depleted quickly. The eye-sensor is specific for K3 Mark III and such scenario should not happen for any other Pentax cameras.
This makes a lot of sense – thank you for the alert!