I read my Kindle Paperwhite maybe 2-3 hours a day - the battery lasts for weeks between charges.
My wife reads more than me and she doesn't charge hers very often either.
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Since I started reading Biggles books nearly 50 years ago I have been an avid reader and I have nothing but praise for the Kindle - it is compact, easy to view and you don't lose your page! It is also very light - I tend to read long books and they can be fairly heavy esp' when reading in bed - it can be awkward to get comfortable whilst holding them. The Kindle solves this problem.
i love the ability to cruise around the Kindle Store reading reviews, reading samples etc before making my purchase.
The books are very cheap (generally - there is the odd exception) and tbh I have only had a couple of books where poor proof-reading has been an issue.
I also love the wish list facility and the daily deals - the latter makes me read a broader spectrum of books than I usually would.
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The Kindle is also very cheap and very durable.
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Apart from coffee table books, illustrated books , first editions etc then I cannot see how the average paperback is any better in the 'real' than on the Kindle.
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As for the bricks and mortar shopping experience - In the average high street store the range of books is nowhere near the breadth of the Kindle Store and quite often I would troop on over to our local Waterstones and return dejected as I couldn't find either what I specifically wanted or something that took my fancy. That doesn't happen with my Kindle.
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My Kindle - I love it!