The Amazon Kindle Paperwhite earns an 8 out of 10 on our repairability scale (10 is the easiest to repair):

The battery was very easy to remove.

All screws were Phillips #00 screws.

All components likely needing replacement were modular, except for the USB port.

Thin layer of adhesive that needed to broken in order to remove the bezel and access the internal components.

Manufacturer does not provide user-accessible repair documentation.