Aaargh, I wish I had your patience (and knowledge), @Spinningwoman, to add Dropbox to my Kobo Mini as well! It really sucks that whenever I need to send a book to my Kobo Mini, the only way to do it (if it's not purchased via Kobo Store) is via a darn mini-USB cable! Hard to get hold of one these days... Practically all of my devices have switched to USB-C by now.
Update on my charging attempts: After years of doing nothing, Kobo Mini successfully charged back up to 100% for me, and it works normally even when disconnected from the charger, but after only "playing around" with it for about half an hour, battery level dropped from 100% to 87%, so I guess it's hopeless.
(If I could simply give €20 or even €30 to a technician: "Please, fix this Kobo Mini for me, and put Dropbox on it!", I would do so instantly. But after I recently lost €60 in this way, trying to resurrect the ancient 10-inch Kindle, I gotta be careful. I guess I finally need to accept that this Kobo Mini is dead for me, and need to embrace the replacement that's on its way to me: the newly released Onyx Boox Poke 4 Lite. Later on, I might perhaps also invest in the newly released Xiaomi Moaan InkPalm Mini Plus 5.84 3rd Gen, because I suppose it's the closest one can get to Kobo Mini's size these days, although the Xiaomi device has an aspect ratio of 1:2, whereas Kobo Mini was 1:1.)
