And another thing about the Kindle battery: I only charge with the wall socket adapter. I plugged the USB cord into my computer and let it charge while in sleep mode one day, and it actually ran out of power while it was supposed to be charging! Maybe this approach to charging would work if the Kindle was in the “off” position, but it was discouraging to see the battery go dead while connected to a power source under any conditions.
Oh, yeah, even plugged in to the wall, I find that my Kindle charges faster when in the “off” position. That’s recommended (by me).
The rule of thumb is that if you are not 1) using your Kindle like an iPod, 2) using an SD card with a couple thousand books on it, or 3) leaving the whispernet on all day, then anything short of three or four days on a charge is abnormal and should be reported to the authorities immediately.
From what I hear, they will replace the faulty battery for you.