dwalbaum: are you actually turning the Whispernet off, or are you just putting the Kindle to "sleep" - ? There's a big difference. If you turn the wireless off (hit the menu button, then choose "turn off wireless" from the selection list) then you will see a dramatic improvement in battery life - from 2 days to up to 2 weeks.
When the unit is "off" (aka asleep) the wireless is still on and periodically checking for new material. That drains a lot of battery, especially if you're in an area where the cell coverage isn't very good, because if it can't find the network it'll check 10 times as often and use up a lot more power.
Sorry if I'm stating the obvious here, but I just want to be clear that the wireless whispernet is always on unless you manually turn it off from the settings menu.
Even though I live in an area with great coverage, I've started turning my whispernet off most of the time except when I'm about to leave on the way to work, which is when I turn it on briefly to download the NY Times. I liked having the Times downloaded automatically, but I didn't like having to watch my battery life all the time and it downloads so quick it's really just as easy just to turn it on when I need something.
I wish the Kindle had a setting to keep the wireless turned off most of the time, but "wake" once a day to check for new material. I had a PSP for awhile that could be set to do that with podcasts and it was one of the best features of that device. It would save a lot of battery on the Kindle to have that third option instead of just "always on" or "always off."
|