David, turning off the Wi-Fi is what putting the unit in airplane mode does.
eschwartz, I've got the Kindle 4 basic, which is not a touchscreen. It has the single controller at the bottom, with the two page-turning buttons on the side. And I can see why I might want to do a reboot from time to time, but I don't see a relevance there to turning it off every night.
Should I just leave it on most nights?
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