When I first got my K3 and I as downloading the books and it was indexing I was charging every other day. Now I have a rule of ordering and downloading a book every 2 weeks. The books I am getting or tech books for my job requirements. So I only turn on the Wifi as needed for the download. I know that now that the new year is here I will be reading a lot more so I do not expect that I will get that long out of the battery.
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