Originally posted by slocant However, after a few seconds in the charger, the battery's voltage output is reset.
That's a good way to damage a battery.
Regardless of type, once discharged, let it charge properly on the factory charger until the charger reports the battery is charged.
From new (and the manual), it should take up to 5 hours to fully charge the K-01 battery.
Szenario: I'd suggest running the same sort of shooting, but with a full battery, and swapping SD cards to see if that alters the behaviour. I'm inclined to think you've got a dodgy SD card that is holding up the data writing, causing a buffer error in the camera processor - default action for a lot of electronics is to shut down when encountering a unrecoverable error is to shut down.
Originally posted by Medium FormatPro Yet have rarely had the need to use the sensor clean function built into the camera; and I change lens' quite frequently in most types of environments - besides rain.
You must have been lucky
I've copped a pile of dust in some environments, the sort that won't vibrate off easily, probably due to the dust's static charge more then anything else. Swapping to carrying the camera lens down in my bag helped reduce the amount of stuff sticking to the sensor, even so, I've had to use sensor swabs twice in the last year, and a blower brush regularly.
Originally posted by Medium FormatPro simply aim it up at a clear blue sky and take a few pics every once in a while
Seconded,... but make sure to close down the iris to f11 or f16 - there's plenty of small dust that won't show up at f2, but the moment you're shooting in bright conditions and need deep focus, whammo, sensor spots...