I read outside at lunch today, in the mid 70's and sunny. I did notice the black border with the buttons did get a little hot to the touch. I use a case that folds back ,and the back was warm but not hot. I'll have a better idea of how hot it gets when we have 80's, it might get too hot to hold then. At least in bright sun. I think reading in the shade with the Oasis 2 might be best for temps 80's plus.
I used a PW3 last year and it got warm but not too hot to hold with a cover in the sun.
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