Originally posted by ZombieArmy A lot of my user selections are fine, which makes this even more confusing
User settings are often stored in flash memory which doesn't need battery backup, but the real-time clock (with the exception of a few chips which have a built-in cell) requires constant power to maintain its function and time keeping. That zoom function - I don't know. I would think that would go the same place as the user settings but????
Most battery back-up cells are soldered in but if accessible, are easy to replace. If you decide to replace your camera, I would go on-line and see if there are any guides to K-01 disassembly and pop the cover. If you can locate the battery, it should be an easy fix if you have any soldering skills. You might have to go to Mouser or Digi-Key to locate the proper cell. Usually they are lithium and often they don't get a charge from the main battery but just have a long life in this application (unfortunately no long enough in your case).
I used to be frustrated with multi-thousand dollar pieces of test equipment which had internal coin cells. It would seem that there would be a better way. For time-keeping clocks though, it's almost a necessity.
I'm using a computer which has an internal cell, and it has been good for over 18 years now (knock on wood). I have another which needs a coin cell change every two years. It's unfortunate to know the K-01s and perhaps even the K-1s are doomed to a repair job (or replacement) for this reason. Something my old film camera wasn't subject to.