I tether my iPhone 3G to my MacBook Pro on occasion and never have any worry about battery drainage. When wired, I'm also constantly charging while it's tethere

I tether my iPhone 3G to my MacBook Pro on occasion and never have any worry about battery drainage. When wired, I'm also constantly charging while it's tethered over USB, which is irrelevant for iPad tethering. When I do have to wirelessly tether it, I'm usually not connected for more than an hour, and it is honestly equivalent to watching an hour long movie in iTunes or playing a game for an hour. I honestly don't understand why tethering gets such a bad rap for battery drainage, when from my experience, _using_ the phone drains it just as quickly. Sure, it uses the network more heavily, but it shouldn't be doing a whole lot more.