I don't feel that the leather battery cover is enough protection. It doesn't cover the entire back of the Oasis and I don't want it to get scratched up in my bag. Plus, it doesn't seem like it would be protected if dropped. I'm worried that it might fall out of the cover.
I found a sleeve that I use. It's specifically made for the Oasis with the leather cover on. When I'm not reading I put the Oasis back into the leather cover and then slide it into the sleeve.
https://www.etsy.com/listing/6126297...f=sr_gallery_8