I use the Fujitsu Quaderno A4 as my daily reader and notetaker (PDFs only).. it is absolutely fantastic. Simple but extremely thoughtful design. Extraordinarily light, durable, long battery. "It just works".
Most reviews I have seen say the battery life is terrible (which is the reason I haven't bought one). Can you share a little more on your experience and the 'long battery'.
I use it "off and on" (say 1-2 hours each day) for several days.. I probably charge it once every 3 to 4 days (and by then maybe it's 30-40%)? I haven't noticed a battery issue at all. My intuition is it lasts a week with normal usage. I always make sure to keep Wifi/NFC off of course (as it is not an Internet device).