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Originally Posted by TomF;
Amazon states that for the Kindle Wi-Fi the battery will last three weeks with Whispernet on whereas the 3G model will last only 10 days with Whispernet on (includes both Wi-Fi and 3G). They both last up to a month with Whispernet off.
3G takes significantly more power than Wi-Fi which results slightly less than half the battery life. It's too bad that there isn't a way to turn off 3G while leaving Wi-Fi on.
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