I have had the Kindle 3rd Gen, the one with the keyboard at the bottom, for about 10 years. After many years of it being forgotten in a shelf I decided to start using it again about 3 months back. Needless to say that the battery was gone and the kindle was stuck in the low battery screen.
I purchased a new battery of eBay,
https://www.ebay.com/itm/293380358743 , and replaced the old one with the new.
After the swap the Kindle continued to be stuck on the low battery screen. I tried all the possible resets, long charging stints and kubrick and nothing seemed to work at the time. Until one day for no apparent reason it came back to live.
The problem I have now is that anytime I disconnect the Kindle from the charger it gives a low battery message. And the message reappears every now and then whilst reading.
I tried to install updates but I am not able to, when i click on "Settings - Settings - Update" i get a message that reads the "battery level is too low to install the update".
I tried Kubrick again and the Kindle came back but is still exhibiting the same behavior.
I have enabled diagnostics mode by creating a blank file named ENABLE_DIAGS in the root directory and under the power menu I can see the battery capacity at 11%-13% even after a 15 hour charging stint. Battery voltage reads 3662. I have removed the battery and measured the voltage with a multimeter and reads 4.1v. It doesnt matter how long i leave the KIndle charging it never goes past those same values.
Anything else I could try? Any suggestions on what I could do?