I literally got my brand new latest (10th generation) kindle paperwhite yesterday. After using it a couple hours it needed recharged. This seemed odd to me because it was advertised as running for "weeks" on a single charge. So I plugged it in and after about an hour the status light was green and I saw that it was fully charged. But when I woke up this morning I went to use my paperwhite and noticed on the screen was a giant battery icon with a lightning bolt in the middle. How did it lose its charge overnight when I wasn't even using it? I distinctly remember my screen was not on when I went to bed last night. Is this a defective unit? What should I do next?
Did you download a lot of books? If so, a Kindle will use significant power while indexing new downloads. It could also be updating (or trying to update) the software. Leave it plugged in for a day or two, with the wifi on.
If the issue persists, try rebooting: Make sure the Kindle is charged, unplug it, press and hold the power button in for a full 30 seconds (time it, and ignore prompts), then release and leave it alone for a few minutes while it restarts.
how many books did you download? They all have to be indexed and that uses a lot of battery power. This goes on even when the device goes to sleep. And if one book gets tuck indexing, this will continue until it's either removed from the device or or it finally indexes. Supposedly there's one bible that takes over 13 hours to index. I had 200 books on one of my devices and the battery almost depleted within 6 hours when a Kindle update required re-indexing of all my books
and if it updated the OS, that eats up a battery too. And this too can occur if you leave wireless on and it downloads overnight.