Hi Larry, I have been gone for a few days, but my brief read through the messages, I have not seen this explained any further. According to my observations, the drainage only happens while the unit is locked. I put new batteries in on Tuesday. Wednesday morning it went from 100% to 83%. I loaded the latest beta, which i believe ends in 21. Thursday morning, with no further use other than down loading the firmware Wednesday morning, the battery level was at 66%. I read some with it on Thursday, and locked it again for a few hours. It was down to 55%. I then unlocked it and left it sit for 24 hours. The battery level did not change. I then locked it again and about 8 hours later, I was told to change the batteries. So, whatever it is doing, it seems to only do it while it is locked. Richard