The Kindle Oasis is a major departure. It’s an asymmetrical design that’s dramatically thinner and lighter than the Touch design, but with one wider, thicker edge that contains the battery and doubles as a handle. The device itself sacrifices battery life, but it comes with a leather battery case that effectively doubles your reading time.
http://arstechnica.co.uk/gadgets/2016/05/amazon-kindle-oasis-review/