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I have just purchased the latest gen kindle paper-white (2016 300ppi) and received a case with a magnetic cover. Doing a little testing with the magnet in the corner, I can see that even when I turn my kindle screen off using the button, the magnet being pulled away powers it on. When I place the magnet on the kindle again, the kindle displays the screen-saver rather than turning the screen off.

From what I understand about e-ink technology the technology is bi-stable meaning the actual display of the image doesn't drain power, its the refresh of the page (as well as wifi, the back-light, touch response and the cpu processes). On the lowest brightness setting the kindle has an almost unnoticeable light source which can be seen in the dark as a glow. When I use the magnet and the screen-saver comes on, the light appears to shut off completely.

That said, a number of sources on-line say this light stays on when the screen-saver is displayed which will still drain the battery over a long period of time. I don't think this to be true but I can't confirm it either. Is this true of the current gen model, older models or not?

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  • When the cover is closed, the magnet should trigger the screensaver and the backlight should turn off completely. You can verify this by bringing your kindle into a very dark room, such as a closet or bathroom with the lights turned off. The screen light should not stay on at all when the cover is closed. Is this what you're asking? Dec 3, 2016 at 2:38
  • The issue appears to be fixed - if you close, then open, then close the cover the second closing appears to perform the same action as closing it when it isn't in "slide to unlock" mode. This was a recent update a few days ago.
    – wizzwizz4
    Aug 12, 2017 at 10:42

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