I thought I’d start this thread here so as not to drag the iOS 11 Betas thread further off topic.
I’m not sure how much searching the WiFi does, if you’ve turned off the option to notify you of new networks. I think in that case, it only scans for networks if it needs assistance in determining your location. In any case, whilst I agree that some scanning will go on in the background, what I’d really like to know is what impact this has on the battery.
I would hope that with the integrated electronics and software in the iPhone, this would be negligible. Moreover, I’d prefer engineering effort was spent on reducing WiFi power to negligible levels when I’m not connected to a WiFi network. Turning WiFi on and off it too much of a hassle for me. I like to just leave things on and have the phone manage the power.
Anyway, if anyone has any figures on background WiFi power draw, I’d definitely be interested!