This page provides help for those who need to replace the battery in their reader.
These days most eBook readers do not provide an easy way to replace a battery that has gone bad. Most of them will change the battery for you for a price if you contact them and send the unit to their repair facility. Some may have local facilities that you can simply drop by.
 Obtaining your own battery
Note that opening up the unit may void your warranty.
Some locations for getting a battery.
- https://www.newpower99.com/ is a site that offers replacement batteries for portable electronic devices. They include instructions and possibly tools.