Does leaving WiFi on your DSi drain the battery?

I've tried searching on google and on these forums, but there doesn't seem to be a definitive answer. Some people say it does drain the battery, so your best bet is to turn it off, however some people say it just turns the yellow light on until you actually use the wifi in a game so it has no effect on the battery. Does anyone really know if it does or not?

yes it does. How much? I don't know... but my Macbook gains an extra 20 min when I shut off the Wifi and bluetooth

i always leave my wifi on because i like haveing a yellow light and blue light on at the same time

It does; how much, I don't know. On many other mobile devices like phones and stuff, WiFi eats up a lot of battery.

I don't have a DSi, I have a DS Lite...but I can say for sure that it drains the battery life at a noticeably quicker rate. I was playing Animal Crossing: Wild World a few times now with a friend, and my battery would drain after playing for an hour or two. But it definately gets the job done, and if you are charging while you play then you can even stay connected for a while longer.

I don't own a DSi yet, but I plan on getting one soon. What is the WiFi used for?Kip_Drordy