WiFi and Battery Power question

I've noticed that while in my house, if I leave my iPhone connected to my wifi network, when I unlock the phone, the "edge" logo is up for a few seconds until it reconnects to my wifi.
When the phone is locked, if the wifi is still enabled, does it drain the same amount of power as if it was locked with wifi disabled?

Hey Tim,
The iPhone battery web page describes this and other tips to help get the most from your iPhones battery charge.
"Wi-Fi: Wi-Fi consumes power even if you are not using its features to connect to a network. You can turn it off to save power. Go to Settings > General > Network > Wi-Fi."
http://www.apple.com/batteries/iphone.html
Jason

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