Advice on response to dealer service guy

[SigmaPi]

All,

So I took my 99 Boxster in yesterday to have a couple of items addressed under warranty (CPO).

1. When inserting key into ignition, sometimes the key will not turn and I have to fiddle with it for many minutes in order to get it to turn. While doing this sometimes the cars electrical system will turn on or won't turn off.

2. While sitting at a stop light idle will drop very low and then the engine catches and RPM's go back up. It has stalled a couple times as well.

Customer service rep calls me today and leaves the following message: Sir, I'm not sure what is wrong with your ignition,we can't recreate it. We also would like to know when the last time the battery died because voltage is very low. This could be part of your problems associated with the drop in RPM's and stall's as well as the electronics acting goofy. Please call me back at ###-####.

As far as I know, a bad battery does not physically lock the ignition to where I cannot turn the key. I am also unsure how he could make that leap unless I am missing something. As far as the RPM's dropping and the call stalling while at idle, that doesn't make sense either. If I have a bad battery on one of my other 2 cars, a bad battery does not make them stall, they simply run on the alternator and I can't start it once I shut it off. Anyone have any suggestions on how to approavh this when I talk to him tomorrow?