Hello! I have the iPad 2 3G and I'm wondering about the drainage of the battery. Hope you can help me out. 1. If I have both 3G and WiFi activated at the same time I'm guessing that iPad is using the WiFi connection, right? 2. Does this also mean that it uses more battery (if 3G and WiFi is connected/activated at the same time). 3. What is using the least battery: 3G or WiFi? Thanks in advance!