As a good number of us wait for the 3G models of the iPad, Apple has added a new line under “Battery and Power” at the iPad Spec page: “Up to 9 hours of surfing the web using 3G data network“. An hour less vs surfing via WiFi as stared by Apple. With everyone praising iPad’s excellent battery life, we wouldn’t be surprise if it can offer more than 9 hours on just browsing the net.