I haven't dug too deep into the answer, but it seems like something disconnects when I run on battery mode. The page (at 192.168.1.103) still runs ok on the laptop, but the iPad next to it
invariably seems to often give 'server not responding' until I plug the laptop power back in.
So maybe it isn't Apache, but the WiFi?
The sleep timer is set to 1hr on battery, 'never' on powered.
I just looked at this question:
I am on 10.6.8. Is that WiFi problem still an issue?