Originally Posted by NullNix
The wifi uses a *lot* of power, and isn't entirely off even when the machine is otherwise suspended (IIRC). When I turn it on, associated and with a strong signal, my battery drains about twice as fast as it otherwise would. If the signal is weak, the drain is even faster. That suggests it's using more power than the screen.
Amazon's suggestion that people leave the wifi on so they can receive OS updates is nuts in my opinion. I don't know anyone who does it, though perhaps people who are used to plugging everything they own in to recharge every night are happy to leave the wifi on 24/7.
I get the Wall Street Journal and the Financial Times delivered via WIFI.
Plus, I like my books and notes to sync.
So I don't ever turn it off.