58-000008,MC-354775-03 Battery for Amazon DP75SDI EY21 Kindle Paperwhite 2014
A look inside a Signature Edition Paperwhite. The battery appears easy to replace and the back case was easy to remove with no damage to the Kindle using a plastic prybar. :
How to Replace a Kindle Battery: Fire, Paperwhite, 2, & Touch
Battery Replacement : r/kindle
Battery for Amazon Kindle 10th Gen 2019 26S1019, 58-000226 3.7V Li-Pol – Fusion Battery