Wow, I am amazed at how much interest this topic has raised... I do want to mention that I am not questioning about the charging being turned off when the switch is set to alkaline... the question was to do with whether or not the battery pack (cells) still supply power along with the adapter when it is plugged in. Sounds like it doesn't, which implies that when the plug goes in it physically disconnects the circuit to and from the cells.. but I guess the safest is to just take a cell out when I am mobile.