Yeah, I figured it would be related to processing power too… I think the book I had in mind had quite a few pictures and if they were high quality then that would explain the power draw… maybe? I’m skeptical it would be so power hungry if it was just text. I should do some actual testing.

I’ve enjoyed my kobo libra h2o a lot but PDFs can be a bit challenging with its compact screen size.

Big PDFs tend to drain the battery quite fast too but this may not be such an issue with larger models.

I use it with Calibre and my local library has some books available via Overdrive. Calibre can convert books from other formats to epub. PDF is trickier in my experience but other e-reader formats have worked without a hitch.

If your unfamiliar with Calibre you can give it a go before making any decisions and convert a few books with it or something. Not necessarily the prettiest software but it does everything I need it to and does it well.

Sidenote:

I’d be curious to try one of those chinese e-ink android tablets one day.

Edit:

The kobo/rakuten store is quite good too, no complaints.