ipad card version and WiFi version, WiFi version is more resistant to power, because WiFi operation, relative to the tablet data traffic to save more power. However, in the absence of WiFi environment, the tablet is no way to use, in order to facilitate the user to surf the Internet, the release of the tablet has joined the card version, the internal components are more, and the power consumption is less than the components. So the WiFi version of the tablet will use less power than the plug-in card.
wifi version is more power resistant, the card version can be inserted and wifi, the card consumes traffic and power, but the card version is good mobility, does not need wifi signal, plug in the mobile phone card on the line