I just charged my O3 for only the 2nd time. First time was when I got it last Monday (Aug 5th). I haven't had a chance for a full long reading session as I normally do as my brain seems to be on slow mo with the heat in the 102-104 degrees right now.
. But I have been reading every day maybe 2 hours total? Playing with light and all that.
Its not going down when it just sits, which is good. So I am happy with the performance on it.