I quite recently bought a brand new PocketBook InkPad Color, having read something about "a month per charge".
But now I've yet again recharged it because it was almost out of power after just 1-2 days. I'd say 48 hours tops.
Sure, I've used the light (on the lowest setting) when reading in the dark for a while, but not very long. And I've only opened various books in it -- not used any kind of CPU-intense game or something. (If such even exist.)
I must say that I'm baffled and disappointed by how quickly the battery is drained with such minimal use.
Whenever I don't use it, I press the button to make it go to sleep.
Is there something wrong with my unit? I frankly can't bear returning another item in my life, so I hope that this is normal. But it surprises me, because I thought that even smartphones had much better battery life than this, and they do much more advanced and energy-draining things. The whole point of an "e-reader" is that uses a special kind of screen to use minimal battery and near-zero battery unless you actively open a book or change pages, is it not?
I will say that I don't have any smartphone, and never have had one, so I don't really know how long they last, but I assume that you don't have to charge those every single day.