My K2 is only a few weeks old and I get a max of 4 days charge with Whispernet on. I don't search anything, nor use the web browser. I use my K2 about 2 hours a day. However I don't have the 3G network where I live, so it's using the Edge network instead. So I wonder if the wireless adapter is working harder to find a signal and it is wearing the battery down faster than someone's Kindle that receives the 3G signal.
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