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Old 08-20-2010, 11:27 AM   #10
TomF
Kindle Enthusiast
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Posts: 243
Karma: 1818
Join Date: Jul 2010
Location: San Diego, CA
Device: Kindle 3G Graphite, Kindle Fire
Quote:
Originally Posted by norti View Post
From the Kindle 3 manual:
Your Kindle automatically turns 3G coverage off when you connect using Wi-Fi. If you disconnect from a Wi-Fi network or if you move out of Wi-Fi range, Kindle automatically switches back to 3G coverage.
Thanks for posting that! I have read this section of the new manual several times but I guess I just didn't retain the fact that 3G is actually turned off when using Wi-Fi. I thought that it just used the Wi-Fi connection instead of 3G. I guess I was focused on the part in the manual that says when you turn Whispernet off your are turning off both Wi-Fi and 3G and there didn't appear to be any way to turn off just 3G.

If 3G actually does get turned off if the K3 is connected to a Wi-Fi network that might mean that if I left Whispernet on and my K3 was connected to my home wireless network the entire time that the battery should last up to three weeks just like the Wi-Fi model.

The reduced battery life for the 3G+Wi-Fi must be due to the fact that if you aren't actually connected to a Wi-Fi network the 3G is still on and using more battery power.
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