I've had two Kindles since 2010. (My first kindle had a physical keyboard it was that long ago) It broke because I had it in my back pocket and I sat on it. Bo

I've had two Kindles since 2010. (My first kindle had a physical keyboard it was that long ago) It broke because I had it in my back pocket and I sat on it. Bought a new one immediately. I've yet to have any measurable battery degradation on either and I read 1-3 books a month. (Including 1000+ page monsters by Brandon Sanderson).