Always connected is marketing speak for a 3g connection. its the way marketers like to differentiate from wifi. With wifi you have to be near a hotspot so are not "always connected". it has nothing to do with the ability to turn it off or not.
The thing would never make it through the FCC if the wifi and 3g couldnt be turned off.
battery life wont be noticeably different unless using one of the wireless connections. the Touch will have to power the IR so it would be less over all than the non touch version. all the eink kindles will get at over a month under the conditions they list.
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