At 11:50 AM 8/9/2009, you wrote:
The DC version of the 'wall-wart' is rated by voltage and current. They aren't regulated, so the rating of voltage is the voltage out at the full rated current. Otherwise, the voltage is higher. So, depending on how much current the camera was taking, the voltage may have been as high as 10 or 11 volts.
It may have been that high when they were new, but I tested one of the default adaptors that is still working and it is putting out 7.9 volts / no load. That adaptor has been running 24/7 for the last four or five years.
Of course, the same thing happens with the 9V adapter,
The 9 volt one I hooked up is putting out 12-13 volts no load.
So what does this mean? Run the camera for a while on the 'new' adapter and see how warm it gets. You might not notice the difference.
I hooked it up yesterday afternoon so it has been running 20 hours. Fortunately, there are two cameras in his bedroom on opposite walls about a foot down from the ceiling. The new 9 volt one feels noticeably warmer then the old 8 volt one but performance is a lot clearer on the 9 volt. The cameras have an aluminium cover which is probably good for heat dissipation.
