I don't see why this is that much of a surprise to anyone. The 3DS is a dedicated gaming device, all its power goes towards gaming. The iPhone is a phone, it uses lots of power on non-gaming features, phone, SMS, staying on a wireless network, etc. Not all of the iPhone is used towards gaming, which would explain why it requires more power. And look at the price difference, the 3DS would be maximum $300 in Canada and/or United States (likely $270, and $250 respectively), whereas the iPhone 4 is priced at $600 without a contract up here in Canada.