Battery at rest....

patrickt · 03-12-2019, 12:30 PM

Okay, I took my new PW4 and charged it to 100%. The green light came on at 97%. I unplugged the Kindle at 100%, turned on Airplane Mode, and closed the cover. I set the alarm for eight hours. When the alarm went off I checked. It was 99%. I turned off Airplane Mode and closed the cover. I set the alarm for eight hours. I wasn't home when the alarm went off and didn't check till two hours later. Ten hours without Airplane Mode and the battery read 99%.

I use two Kindles and alternate them. If I turn on Airplane Mode on the Kindle at rest the syncing gets screwed up and simply telling the Kindle to sync when I turn it on doesn't help. So, I'm just leaving Airplane Mode off unless I get on an airplane. I wonder what happens if someone has a Kindle in the luggage or carryon in the overhead compartment?

Paranoia terrifies me.

twowheels · 03-12-2019, 01:10 PM

Nothing happens. Most airlines now allow WiFi throughout the entire flight and even continue streaming in-flight entertainment until the gate.

Sent from my iPhone using Tapatalk

Popup · 03-14-2019, 03:27 AM

Beware that those 'battery level' readings should be taken with a whole lot of salt.
All that your experiment shows is that the battery doesn't drain instantly in either mode.

I believe that when not in 'Airplane Mode' the Kindle makes irregular 'phone home' pings to the mother ship, but if there's no new firmware update or any new books to download it doesn't really do much, and shouldn't consume much more power than with WiFi switched off. (It really makes a difference if you're leaving it for weeks, and add new books and progress updates on other Kindles, though.)

03-12-2019, 12:30 PM	#1
patrickt Wizard Posts: 1,221 Karma: 8381518 Join Date: Oct 2009 Location: Oaxaca, Mexico Device: Paperwhite 4 X 2	Battery at rest.... Okay, I took my new PW4 and charged it to 100%. The green light came on at 97%. I unplugged the Kindle at 100%, turned on Airplane Mode, and closed the cover. I set the alarm for eight hours. When the alarm went off I checked. It was 99%. I turned off Airplane Mode and closed the cover. I set the alarm for eight hours. I wasn't home when the alarm went off and didn't check till two hours later. Ten hours without Airplane Mode and the battery read 99%. I use two Kindles and alternate them. If I turn on Airplane Mode on the Kindle at rest the syncing gets screwed up and simply telling the Kindle to sync when I turn it on doesn't help. So, I'm just leaving Airplane Mode off unless I get on an airplane. I wonder what happens if someone has a Kindle in the luggage or carryon in the overhead compartment? Paranoia terrifies me.

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03-12-2019, 01:10 PM	#2
twowheels Wizard Posts: 1,790 Karma: 13412766 Join Date: Nov 2010 Device: Kobo Clara HD, iPad Pro 10", iPhone 15 Pro	Nothing happens. Most airlines now allow WiFi throughout the entire flight and even continue streaming in-flight entertainment until the gate. Sent from my iPhone using Tapatalk

03-14-2019, 03:27 AM	#3
Popup Zealot Posts: 102 Karma: 100000 Join Date: May 2011 Device: kindle3, paperwhite-2012, Oasis-2016, paperwhite-2019	Beware that those 'battery level' readings should be taken with a whole lot of salt. All that your experiment shows is that the battery doesn't drain instantly in either mode. I believe that when not in 'Airplane Mode' the Kindle makes irregular 'phone home' pings to the mother ship, but if there's no new firmware update or any new books to download it doesn't really do much, and shouldn't consume much more power than with WiFi switched off. (It really makes a difference if you're leaving it for weeks, and add new books and progress updates on other Kindles, though.)